You open your eyes and, before your feet have touched the floor, your body seems to have started the day without you. Your heart feels a little too present. Your thoughts are already rifling through the inbox, the bills and that conversation you wish had gone differently. Nothing has happened yet, but your nervous system appears to be holding a 9am meeting.
If you regularly use cannabis to relax in the evening, this kind of morning can be particularly confusing. Wasn't last night's smoke, vape or edible meant to help you unwind? How can something that makes the sofa feel softer at night possibly leave your stress system busier when the alarm goes off?
A new study offers an intriguing clue. Researchers found that frequent cannabis users woke with more cortisol in their saliva than people who rarely or never used cannabis. Cortisol is involved in the body's response to stress, but it also helps manage blood pressure, metabolism, inflammation and the energy needed to get moving in the morning. It is not inherently harmful. You need it.
The interesting part is timing. Cortisol normally rises after you wake, helping your body shift from sleep into action. In this study, frequent users appeared to begin that process from a higher starting point. That does not mean every regular cannabis user wakes in a panic, nor does it prove cannabis caused the difference. It does suggest that the body's internal stress clock may be worth paying attention to, especially if a habit intended to create calm is sitting beside worsening anxiety, flat mood or restless mornings.
What the Researchers Actually Found
The Oregon State University study involved 82 adults. Thirty-nine used cannabis on at least three days a week and had used it during the previous month. In practice, this was a fairly frequent group, averaging just over 20 days of use in the previous 30. The other 43 participants used cannabis rarely or not at all.
For two consecutive weekdays, each person collected saliva immediately after waking, again 30 minutes later and once more at 9pm. The researchers also asked about perceived stress, sleep, anxiety, depression and cannabis-related problems.
The headline result was simple: the frequent-use group had higher cortisol at the moment of waking.
But the details matter. The two groups did not have a significantly different cortisol awakening response, which is the increase between the first sample and the one taken 30 minutes later. There was also no clear group difference in cortisol 30 minutes after waking or in the evening. In other words, the frequent users did not experience a bigger morning surge. They started higher.
There was another revealing detail. Within the frequent-use group, higher waking cortisol was linked to more cannabis-related consequences, such as problems affecting health, memory, relationships, work or daily responsibilities. It was not linked simply to the number of days a person used cannabis. That distinction suggests the pattern may have more to do with problematic use than with ticking off a certain number of sessions on a calendar.
The frequent users also reported poorer sleep quality and higher levels of perceived stress, anxiety and depressive symptoms overall, even though the study excluded people who reported a diagnosed psychiatric disorder. Yet their stress ratings at the exact saliva collection times were not significantly different from those of the control group. Their bodies looked different on the cortisol measure, but they did not necessarily say, in that moment, "I feel more stressed."
That is why "wake up already stressed" is useful shorthand, not a diagnosis. Cortisol is a biological signal, not proof that a person feels anxious.
Why the First Half Hour Matters
Cortisol follows a daily rhythm. Levels are generally higher around waking, rise during the first 30 to 45 minutes, then gradually fall across the day before reaching their lowest point around the early part of sleep. Light, sleep timing, illness, medication, food, exercise and psychological stress can all affect the pattern.
The system coordinating much of this is called the hypothalamic-pituitary-adrenal axis, or HPA axis. Think of it as a three-person relay team. The hypothalamus in the brain passes a chemical message to the pituitary gland. The pituitary passes another message to the adrenal glands above the kidneys. The adrenal glands then release cortisol, helping the body make energy available and respond to whatever the day is demanding.
The cortisol awakening response is the rise after waking, not the first cortisol reading itself. That distinction sounds fussy until you picture two cars climbing the same hill. Both gain the same amount of height, but one begins halfway up. The climb is similar; the starting position is not.
Researchers care about this first half hour because it offers a window into how the stress system anticipates and prepares for the day. However, there is no single "good" cortisol awakening response that applies neatly to everyone. A large meta-analysis covering 212 studies found that links between morning cortisol and psychological wellbeing were real but small and varied. Depression was associated with greater total cortisol output after waking, while post-traumatic stress showed the opposite pattern. Other reviews have found both heightened and blunted responses depending on the condition, the person and the way cortisol was measured.
Cortisol patterns have been studied alongside depression, post-traumatic stress, burnout and other forms of chronic stress, but the direction is not always "higher equals worse". Sometimes the alarm is too loud. Sometimes it has been ringing for so long that it barely reacts. Dysregulation is the useful idea here, not a simplistic cortisol scorecard.
The Calm Paradox
People use cannabis for many reasons: pleasure, sleep, pain, boredom, creativity, social connection and, very commonly, stress relief. For some, the immediate calming effect is entirely real. Thoughts slow down. Muscles loosen. The emotional volume drops. A difficult evening becomes easier to tolerate.
That short-term experience can coexist with a different long-term pattern.
Cannabis interacts with the endocannabinoid system, a network involved in stress, mood, appetite, memory and sleep. THC, the main intoxicating component of cannabis, activates cannabinoid receptors that are also connected to the HPA axis. An evidence review of cannabis and stress regulation found that acute THC can raise cortisol, while frequent exposure may dampen the cortisol response to a new stressor and alter the normal daily rhythm. The science is not perfectly tidy, but it repeatedly points towards changed stress regulation rather than a simple permanent lowering of stress.
Imagine turning down a noisy radio every evening by placing your hand over the speaker. It works while your hand is there. But it does not repair the wiring, and repeatedly managing the noise in that way may change how quickly you notice it, how strongly you react to it and how uncomfortable the room feels when your hand is removed.
This can create a loop. You feel tense, so you use cannabis. You feel better for a while, which teaches your brain that cannabis is an effective exit from tension. If dependence develops, tolerance, sleep changes and withdrawal between sessions can make sober periods feel more uncomfortable. That discomfort creates a stronger reason to use again.
The new study does not prove that this loop occurred in its participants. The researchers themselves describe it as a possibility to investigate. Still, the connection between higher waking cortisol and more cannabis-related consequences makes the question difficult to shrug off: is cannabis calming the underlying system, or is it increasingly being used to quiet a system that has become harder to regulate?
When Your Mornings Feel Stuck in the Wrong Gear
Here is the slightly frustrating answer: higher waking cortisol may not feel like anything obvious at all.
You cannot reliably sense your cortisol level. A tense morning may involve cortisol, but it may also come from poor sleep, an approaching deadline, low blood sugar, too much caffeine, medication, pain, menopause, thyroid problems or noise in your environment.
Still, patterns are worth noticing. If your mornings feel physiologically "loud", you might experience:
- waking with a racing or pounding heart
- feeling alert but not refreshed
- irritability before the day has properly begun
- anxious thoughts arriving immediately
- sweating, shakiness or a tight stomach
- low mood paired with a strange sense of agitation
- poor concentration or mental fog
- needing cannabis to feel normal, settle down or face the day
None of these symptoms confirms cortisol dysregulation, and none proves cannabis is responsible. They are prompts for curiosity. The mental health connection often lives in the pattern rather than in one dramatic symptom: an evening habit grows more regular, mornings become harder, sleep feels less restorative, and anxiety or low mood slowly starts taking up more space.
That last point matters because the frequent users in the study reported more anxiety, depressive symptoms, perceived stress and poorer sleep than the controls. We cannot say cannabis created those differences. People who feel worse may be more likely to use cannabis regularly in the first place. Both directions may be true at once.
What This Study Proves, and What It Definitely Does Not
This is a useful study, not a final verdict. Here is the fairest reading.
It found an association. Frequent users had higher cortisol when they woke than controls. The result just crossed the usual threshold for statistical significance, so it should be interpreted cautiously and replicated.
It did not show a larger awakening response. The rise from waking to 30 minutes later was similar in both groups. Earlier studies have reported a blunted response or a flatter daily cortisol slope in chronic users. This study did not reproduce that result.
It cannot tell us which came first. The research captured people at one period in their lives. It did not follow non-users as they began frequent use, or frequent users as they reduced it. Higher waking cortisol could contribute to cannabis use, result from it, share another cause with it, or reflect some mixture of all three.
It was small. Eighty-two participants is respectable for a saliva study, but too small to settle a complex question. The study also excluded people with diagnosed psychiatric disorders, severe medical conditions requiring treatment, and certain medications. That helped reduce some confounding factors, but it also means the sample does not represent everyone who uses cannabis.
The sample timing was not objectively verified. Participants recorded their waking and collection times at home, but the study did not use an objective method to confirm them. This matters because expert guidance on measuring the cortisol awakening response warns that even modest delays can affect the result.
The groups differed in more than cannabis. Frequent users were older on average and drank alcohol on more days. They also had poorer sleep and more mood and anxiety symptoms. Age was not related to cortisol at the collection times, but the other group differences still complicate interpretation. An observational study cannot remove every possible explanation.
It did not establish what product caused what effect. Most frequent users reported cannabis flower as their main form, and a bong as the most common primary method. The sample was too small to compare smoking with vaping, edibles or concentrates. It did not determine whether potency, dose, CBD-to-THC ratio, exact timing or years of use affected the result.
The conclusion, then, is not "cannabis makes everyone wake anxious". It is this: frequent use was linked to a subtle difference in morning stress biology, and the difference was greater among people reporting more problems from their use. That is a reason for better research and honest self-observation, not panic.
Medical Cannabis, Recreational Cannabis and the Country You Live In
Your body does not check the legal label before responding to THC. Medical and recreational cannabis can affect the same receptors, but the context can be very different.
A person using a measured, prescribed product for multiple sclerosis spasms is not in the same situation as someone buying a high-potency concentrate and using it whenever work becomes unbearable. Medical users may have pain, sleep disruption or illness that already affects cortisol. They may also have clearer dosing, known ingredients and clinical monitoring. Recreational products can vary enormously in potency and composition, particularly where the supply is unregulated.
The Oregon study did not separate medical from recreational use, and its exclusions mean it should not be treated as a direct test of prescribed cannabis. That is important. If you use cannabis medically, this article is not a reason to stop a prescribed treatment. It is a reason to mention new anxiety, low mood, poor sleep or difficult mornings to the clinician who manages it.
The legal picture changes what "medical" means too.
In the United States, state rules still form a patchwork. According to the National Conference of State Legislatures, 24 states, three territories and Washington, DC allowed or regulated non-medical adult use as of June 2025, while 41 states, three territories and Washington, DC allowed medical use. Federal rules shifted again in April 2026, when certain state-licensed medical cannabis and approved cannabis medicines moved to Schedule III, while non-medical cannabis remained subject to stricter federal controls. Legal in one state does not mean legal everywhere, and crossing a state border can change the situation.
In the UK, recreational cannabis remains illegal. NHS guidance says cannabis-based medicine can be prescribed only by a specialist doctor or under specialist supervision, and NHS prescriptions remain uncommon. Prescribed products for a limited number of conditions should not be confused with unregulated cannabis or a bottle of CBD oil bought online.
Canada offers a different model. Adults can legally buy regulated cannabis within federal, provincial and territorial rules, while a separate medical access route continues for people authorised by a healthcare professional.
Elsewhere, laws range from full prohibition to decriminalisation, medical access and regulated adult use. They can also change quickly. Check an official government or health source where you live, particularly before travelling. A prescription, membership card or legal purchase at home may mean very little after a border crossing.
Strategies to Try if Your Mornings Feel Like This
You do not need a home cortisol kit and a new identity as an amateur endocrinologist. Start with the part you can actually observe: your pattern.
1. Keep a two-week morning record
For 14 days, note:
- when and how much cannabis you used
- the product and THC or CBD strength, if known
- what time you went to bed and woke up
- how rested you feel from 0 to 10
- morning anxiety, mood and irritability from 0 to 10
- alcohol, caffeine and any unusual stress
- whether you wanted cannabis soon after waking
You are looking for trends, not perfect proof. Does a later or larger dose sit beside a rougher morning? Are non-use days followed by temporary irritability but then clearer mornings? Does alcohol appear to be the more reliable troublemaker? A simple record turns "I feel a bit off lately" into something you can discuss and act on.
2. Change one variable at a time
If it is safe for you, try reducing frequency, dose or THC strength rather than changing everything overnight. Canada's lower-risk cannabis guidance, written mainly for non-medical use, recommends avoiding daily or near-daily use and choosing lower-THC products with a higher proportion of CBD.
One practical experiment might be to create cannabis-free days, move use earlier in the evening, or choose a less potent product. Keep the rest of your routine reasonably stable so you can tell what changed. If you use cannabis for a symptom such as pain or insomnia, plan how you will manage that symptom rather than simply removing your usual strategy and hoping for the best.
3. Expect withdrawal if use has become frequent
After regular heavy use, stopping or sharply reducing can temporarily cause irritability, anxiety, low mood, reduced appetite, vivid dreams and poor sleep. A clinical review of cannabis withdrawal found that symptoms commonly begin within 24 to 48 hours and often peak between days two and six. In heavier users, some can last for two or three weeks, with sleep problems occasionally lingering longer.
This matters because a difficult third morning does not automatically mean reducing was a mistake. It may mean your body is adjusting. Supportive counselling and behavioural approaches are the mainstays of care, and a doctor can help if symptoms are severe, you use other substances, or your mental health may deteriorate during withdrawal.
4. Give your morning rhythm a fair chance
The body's clock likes clear signals. Try getting up at a consistent time, seeking daylight soon after waking, eating regularly, moving your body and keeping caffeine within your personal tolerance. These steps are not a magical cortisol reset, but they support sleep timing and make it easier to see whether cannabis is part of the problem.
If mornings are anxious, keep the first ten minutes boring in a helpful way. Feet on the floor. Curtains open. Water. A few slow breaths. No immediate news feed and no urgent attempt to diagnose your entire life before breakfast.
5. Replace the job cannabis was doing
If cannabis is your main off-switch, using less leaves a vacancy. Fill it deliberately. That might mean a walk after work, a hot shower, music, stretching, gaming with a friend, therapy, or a wind-down routine that does not depend on intoxication.
Research in people being treated for cannabis use disorder found that reducing cannabis use was associated with improvements in anxiety, depression and sleep quality. That does not promise the same outcome for everyone, but it does challenge the fear that cutting down must make mental health worse in the long run.
When It Is Worth Talking to a Doctor
Speak to a GP, primary care clinician or addiction professional if anxiety, low mood, poor sleep or physical symptoms are persistent, worsening or interfering with daily life. It is particularly worth getting help if:
- you regularly use more cannabis than you intended
- you have tried to cut down and cannot
- you need more THC to get the same effect
- cannabis is affecting work, study, money or relationships
- you feel unable to sleep, eat, relax or function without it
- you wake with repeated panic-like symptoms or a racing heart
- you have severe vomiting or abdominal pain, especially if hot showers temporarily help
- reducing brings intense depression, aggression, panic or thoughts of self-harm
- you experience paranoia, hallucinations or difficulty knowing what is real
The CDC's signs of cannabis use disorder include craving, unsuccessful attempts to stop, using more than intended and continuing despite physical, psychological or relationship problems. Recognising yourself in that list is not a character flaw. It means a habit may need more support than willpower alone can provide.
If you use prescribed cannabis, speak to the prescribing clinician before changing your dose. If you are in immediate danger, having thoughts of suicide or experiencing psychosis, seek urgent help through your local emergency service or crisis line.
Frequently Asked Questions
Does cannabis definitely raise morning cortisol?
No. One small 2026 study found higher cortisol at waking in frequent users, but earlier research has reported blunted morning responses or flatter daily rhythms. The most defensible conclusion is that frequent use may be linked to altered stress regulation, with the exact pattern still uncertain.
Is the cortisol awakening response the same as waking cortisol?
No. Waking cortisol is the level measured as soon as you wake. The cortisol awakening response is the increase that follows, usually assessed about 30 minutes later. The new study found a higher waking level but no significant difference in the size of that increase.
Does high cortisol mean I have anxiety or depression?
No. Cortisol patterns are associated with mental health, but they cannot diagnose anxiety or depression. Both high and low or flattened patterns appear in different conditions, and cortisol is influenced by sleep, illness, medication, exercise and time of sampling.
Can cannabis feel calming while raising cortisol?
Yes. Your subjective experience and your hormonal response are related, but they are not identical. THC can make someone feel calmer in the moment while producing physiological effects that do not look calm on every measure.
Should I buy a home cortisol test?
Usually not as a first step. Cortisol changes across the day, and accurate interpretation depends heavily on collection timing. Tracking sleep, mood, anxiety and cannabis use is more immediately useful. If a clinician suspects an endocrine problem, they can choose and interpret the appropriate test.
Will stopping cannabis make my mornings worse?
Temporarily, it can. Frequent users may experience withdrawal symptoms such as anxiety, irritability and disrupted sleep after reducing or stopping. These often begin within two days and peak during the first week. Get professional support if symptoms are severe or your mental health is vulnerable.
Is medical cannabis safer for the stress system?
We do not know from this study. Prescribed products can offer clearer dosing, quality control and medical monitoring, but their effects still depend on THC, CBD, dose, frequency, route and the health condition being treated. Do not change prescribed cannabis without speaking to your clinician.
The most useful response to this research is not fear. It is curiosity. If cannabis is helping you, the benefits deserve to be taken seriously. If it is helping at 10pm but life feels steadily harder at 7am, that deserves equal honesty. Calm is not only what happens while a substance is active. It is also the shape of the hours that follow.
