Bipolar Triggers and Relapse Warning Signs

A trigger is something that makes a mood episode more likely in a person who already has bipolar disorder. Triggers do not cause the illness, but they explain why episodes often arrive after a red-eye flight, a run of short nights, a stressful month, the weeks after childbirth or a change in medication. The useful part is that many triggers can be planned for. This page lists the triggers with the best evidence, then gives you two tools: a worksheet for mapping your own early warning signs and a crisis plan template.

If warning signs are already escalating

Sleep loss, jet lag and shift changes

Sleep disruption is the trigger with the most consistent support. In a study of 3,140 people with bipolar disorder in the UK (Lewis et al., 2017), people with bipolar I were almost three times as likely as those with bipolar II to report that losing sleep had triggered an episode of high mood, and women were somewhat more likely than men to report it. The authors specifically flagged shift work and international travel as situations to plan for.

Sleep loss can be both a trigger and an early sign: needing less sleep without feeling tired is one of the first signs of hypomania or mania for many people, which can set up a cycle. Practical steps:

• Treat a night of lost sleep as a warning signal, not a productivity bonus.
• Before long-haul travel, especially flying east, ask your prescriber for a sleep plan.
• If your job involves rotating shifts, raise it at your next visit. Our page on sleep and bipolar disorder covers routines, light and social rhythm therapy in depth.

Stopping or changing medication

Stopping a mood stabilizer suddenly is one of the most avoidable triggers. NIMH's guide for families says steady treatment works better than treatment that starts and stops, and that stopping medication suddenly can be dangerous. NICE advises that lithium, when it is stopped, should be tapered over at least four weeks, with close watching for relapse during the taper and for three months afterward.

People stop medication for understandable reasons: side effects, feeling well, cost, pregnancy plans or missing the energy of hypomania. All of these are worth raising with the prescriber, who can often change the plan. Do not stop on your own. Read how to stop psychiatric medication safely before any change.

Antidepressants without a mood stabilizer

NIMH notes that treating a depressive episode with an antidepressant alone, without a mood stabilizer, can trigger mania or rapid cycling in a person with bipolar disorder. This is why antidepressants are not used on their own in bipolar disorder, and why antidepressant labels tell prescribers to screen for a personal or family history of bipolar disorder first. The details, including when antidepressants are sometimes added, are on our page on antidepressants and bipolar disorder.

Substances, supplements and other medicines

• Cannabis. A 2026 meta-analysis linked cannabis use with later manic or hypomanic symptoms (relative risk 2.11), an association rather than proven cause. See bipolar disorder and substance use.
• Alcohol and stimulant drugs. NIMH advises people with bipolar disorder to avoid drugs and alcohol, and illicit drugs can mimic or worsen mood symptoms.
• Prescription medicines. Corticosteroids, stimulants and dopamine agonists are among the medicines the Merck Manual lists as possible causes of manic symptoms. Tell every prescriber you have bipolar disorder.
• Supplements. The NIH's complementary health center (NCCIH) reports case reports of St. John's wort worsening psychotic symptoms in people with bipolar disorder, and warns that SAMe may worsen symptoms of mania.
• Thyroid changes. NIMH notes that thyroid disease can mimic or worsen mood symptoms.

Life stress, seasons and childbirth

Major life events, both difficult ones (a loss, a breakup, a job crisis) and exciting ones (a new relationship, a big launch), can disrupt sleep and routine and are commonly reported before episodes. NIMH lists stressful life events among the factors linked to bipolar disorder in people with genetic risk.

Some people notice a seasonal pattern, and NIMH says light therapy "could also be considered" for seasonal worsening of bipolar depression under clinical guidance. The postpartum period is a particularly high-risk window: a 2016 meta-analysis (Wesseloo et al.) found postpartum relapse in 66% of women with bipolar disorder who were medication-free during pregnancy, versus 23% of those who took preventive medication. Planning ahead matters; see postpartum psychosis.

Worksheet: your personal relapse signature

Most people's episodes start the same way each time. Clinicians call this a relapse signature. Filling it in when you are well, ideally with someone who knows you, makes the signs easier to catch early. Copy or print this table; the first rows give examples to replace with your own.

Toward the high side (hypomania or mania)

Toward the low side (depression)

Track the early signs day to day with the free printable bipolar mood chart; patterns are much easier to see on paper than from memory.

Template: a bipolar crisis plan

A crisis plan is written while you are well and shared with the people who will use it. Keep a copy on your phone and give one to your support person.

1. My support people: name and phone number of two people who agree to help.
2. My prescriber and therapist: office numbers, and the patient portal if there is one.
3. My medications: current list and pharmacy number. (Do not change doses without your prescriber.)
4. Signs that mean "call my prescriber today": copy the "Building" row from your worksheet.
5. Signs that mean "go to the ER or call 911": for example, no sleep for several nights with risky behavior, hearing or believing things others do not, or a plan to hurt myself.
6. Crisis lines: call or text 988, or chat at 988lifeline.org; text HOME to 741741; 911 for emergencies.
7. Nearest emergency room: name and address.
8. What helps me and what makes it worse: for example, "a quiet room helps; arguing makes it worse."
9. Practical safeguards I agree to in advance: who holds credit cards or car keys, who cares for children or pets, who tells my employer.

Partners and family can find more on their role in living with bipolar disorder.

At Willow & Stone

Building a relapse-prevention plan is part of ongoing care. Bipolar disorder treatment at Willow & Stone explains how evaluations and follow-ups work; if a higher level of care is needed, for example during severe mania or psychosis, we help you find it. For the bigger picture, start with the bipolar disorder guide.

Common Questions

Sources & Further Reading

• Lewis KS et al. Sleep loss as a trigger of mood episodes in bipolar disorder. Br J Psychiatry 2017
• NIMH: Bipolar Disorder (NIH Pub. No. 25-MH-8088, revised 2025)
• NIMH: Bipolar Disorder in Children and Teens (NIH Pub. No. 23-MH-8081, revised 2023)
• NICE CG185: Bipolar disorder assessment and management (last updated 2 Sept 2025)
• Wesseloo R et al. Risk of postpartum relapse in bipolar disorder and postpartum psychosis: meta-analysis. Am J Psychiatry 2016
• Sanjuan-Ortiz et al. Cannabis use and later bipolar disorder and manic symptoms: meta-analysis. J Affect Disord 2026
• NCCIH: St. John's Wort
• Merck Manual Professional: Bipolar Disorders (Coryell, reviewed Jan 2026)

This article is general education, not a diagnosis or advice for your situation. Do not start, stop, or change a medication without talking to the clinician who prescribes it; stopping a mood stabilizer suddenly can trigger relapse.