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Seasonal depression (seasonal affective disorder)

Also called: Seasonal affective disorder, SAD, winter depression

Depression that comes back each year, usually in fall and winter. Light therapy and other treatments help.

SeasonUsually fall and winter
TreatmentLight box, therapy, medicines

Overview

Shorter days affect body clock and mood.

Symptoms

Common signs:

  • Low mood in winter
  • Low mood that comes back every fall or winter

Less common

  • Oversleeping
  • Craving carbs

When to get medical care

Call 911Thoughts of suicide or harming yourself or others: call or text 988, or call 911.
Get care todayCan't function.
See a doctor soonLow mood each winter.

Causes

Less sunlight.

Does it spread or run in families?

  • It isn't contagious. You can't catch it from someone else.

Who is more likely to get it

  • Living far north

Possible complications

Diagnosis

A healthcare professional asks about patterns.

Treatment

Get more light.

Self-care

  • Use a 10,000 lux light box in the morning
  • Get outside daily
  • Exercise

Medicines

Medicines that may help:

MedicineHelps withGood to know
Antidepressants
Depression

OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.

Prevention

To lower your risk or prevent problems:

  • Start light therapy in early fall

Which doctor treats this

  • Start with your primary care provider (family doctor or internist).
  • They may send you to a psychiatrist (for medicine) and a psychologist or licensed therapist (for talk therapy).

Living with it

  • Keep a regular sleep, meal, and activity routine.
  • Tell one trusted person how you're doing, and plan who to call on hard days.
  • Limit alcohol and drugs. They often make symptoms worse.
  • In a crisis, call or text 988 any time.
  • Long-term illness can affect mood. Tell your doctor if you feel down or anxious.

Support groups and helplines

Back to school, work, or sports

  • Most people can keep working or going to school.
  • Ask about changes that help, like extra breaks or a flexible schedule. Workers may be covered by the ADA. Students may get a 504 plan.
  • The Family and Medical Leave Act (FMLA) may let you take unpaid time off for treatment without losing your job.

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • Many mental health medicines are used safely in pregnancy. Stopping suddenly can cause a relapse.
  • Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
  • Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
  • Mood problems can start during or after pregnancy. Postpartum Support International: 1-800-944-4773.
  • Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

For caregivers

  • Listen without judging, and let them know you care.
  • Encourage treatment, but don't force it unless they're in danger.
  • If they talk about suicide, call or text 988 with them.
  • Take breaks and ask for help. Caregivers need care too.

Outlook

Treatable.

Getting ready for your visit

Bring a list of your symptoms and medicines.

Questions to ask

  • When should I start light therapy?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Seasonal depression (seasonal affective disorder)

Sources

Last updated 2026-11-12.