✔ Backed by: National Institute of Mental Health (NIMH) · MedlinePlus (National Library of Medicine) · 988 Suicide & Crisis Lifeline. Each fact links to its source, and the full list is at the bottom of this post.
If you are in crisis or having thoughts of suicide, call or text 988, or chat at 988lifeline.org. It is free, confidential, and open 24/7.[4] If someone is in immediate danger, call 911.
In early November, the clocks fall back, and suddenly it is dark when you leave work. A lot of people feel a little slower this time of year. But for some people, the change goes deeper, and it may be seasonal affective disorder. Their mood drops, their energy disappears, and the things they usually enjoy start to feel like chores. Then, when spring comes, they feel like themselves again.
If that pattern sounds familiar, it may be more than “winter blues.” It may be seasonal affective disorder, often called SAD. The good news is that SAD is a real, recognized condition, and there are several kinds of treatment that can help. This post walks through what SAD is, what it can look like, and how to start a conversation with a professional.
What seasonal affective disorder is
The National Institute of Mental Health describes SAD as a type of depression that follows a seasonal pattern. Symptoms usually last about 4 to 5 months each year.[1] The most common type is winter-pattern SAD. It usually starts in late fall or early winter and eases in spring and summer.[1]
There is also a summer pattern, though it is less common.[1] So if you feel worse every July instead of every January, that is worth mentioning to a professional, too.
An estimated 10 million Americans are affected, according to MedlinePlus, and SAD is diagnosed about four times more often in women than in men.[3] NIMH notes that living farther north, where winter days are shorter, raises the risk. So does having depression or bipolar disorder, other mental health conditions, or a family history of mental illness. SAD most often begins in young adulthood.[1]
What it can look like
SAD includes the common signs of depression, such as a sad or “empty” mood that lasts most days for at least two weeks, feeling hopeless, and losing interest in things you used to enjoy.[1]
With the winter pattern, NIMH says people often sleep too much, overeat (especially carbohydrates), gain weight, and pull away from friends and family.[1] Some people describe it as wanting to hibernate. With the less common summer pattern, it can look different: trouble sleeping, poor appetite, weight loss, restlessness, and anxiety.[1]
Here is an everyday example. Marcus loves his weekend basketball game. Every fall for the past few years, he has started skipping it. He tells his friends he is tired, and he means it. He sleeps ten hours and still wakes up groggy. By March, he is back on the court and cannot quite explain what happened. Looking back, he sees the pattern. That kind of noticing is a great first step.
This post is not a checklist to diagnose yourself. Only a qualified professional can sort out what is going on, because other health issues can cause similar feelings. But noticing a pattern, and writing it down, can make that conversation much easier.
Seasonal affective disorder treatments to ask about
NIMH describes four main types of treatment for SAD. They can be used alone or together, depending on what you and your clinician decide.[1]
Light therapy. This means sitting near a special bright light box each day. It is used mainly for winter-pattern SAD.[1] MedlinePlus explains that it is often done for about 30 minutes in the early morning, sitting about 2 feet away with your eyes open, but not looking straight into the light. If it is going to help, improvement usually shows up within 3 to 4 weeks.[2] Light therapy is not right for everyone. MedlinePlus notes possible side effects like eye strain or headache, and rarely mania. It also says to avoid it if you take certain medicines that make you more sensitive to light, and it recommends an eye checkup before starting.[2] So talk with your clinician before buying a light box.
Talk therapy. One type, cognitive behavioral therapy adapted for SAD, helps people work on the negative thoughts that show up during the darker months and plan activities they enjoy.[1]
Medication. Antidepressants are another option. NIMH notes they usually take 4 to 8 weeks to work.[1] Whether medication is a good fit is a decision to make with a prescriber who knows your full health picture.
Vitamin D. NIMH says vitamin D may help some people with winter-pattern SAD, but study results are mixed.[1] Ask before adding supplements, especially if you take other medicines.
Everyday habits that can support you
Along with treatment, MedlinePlus suggests some self-care steps for depression: get enough sleep, eat healthy foods, exercise more often, and do activities that make you happy. It also suggests spending time with caring, positive people, and getting involved in volunteering or group activities.[2] MedlinePlus advises avoiding alcohol and drugs, since they can make depression worse.[2]
Small and steady beats big and short-lived. One person might set up a standing Saturday phone call with a friend. Another might put a calendar reminder for a short walk at lunch, when there is still daylight. If you live alone, planning a few “things to look forward to” across the winter can make a real difference in how the weeks feel.
MedlinePlus also suggests learning your early warning signs and having a plan for what you will do if things get worse.[2] That plan can be simple: who you will call, and which appointment you will make. If you need help finding a therapist or mental health clinic, the SynquUp Care Navigator can be a starting point.
How to bring it up with a professional
NIMH encourages people to talk with a health care provider or mental health specialist if they notice seasonal changes in mood or behavior.[1] It does not have to be a big, dramatic conversation. You can say: “Every winter for the last few years, I feel down and tired for months. In spring it lifts. Could this be seasonal depression?”
A few questions to bring along:
- “Could my symptoms be seasonal affective disorder, or something else?”
- “Is light therapy safe for me with my health history and medicines?”
- “Can you refer me to a therapist? Are there online options my plan covers?”
- “What should I do if I start feeling worse?”
If you have had times of very high energy or mood in the past, mention that, too. It helps your clinician choose the safest plan.
Tru-Tips: Start a simple “mood and sleep” note on your phone this week, one line a day. By the time you see your clinician, you will have real information instead of trying to remember how the last month felt.
One Tru Step: Before the clocks change, put one thing on your calendar for each week of November that you can look forward to: a call, a walk, a class, a meal with someone. If you have noticed a seasonal pattern, add one more item: book a visit to talk about it.
Let’s talk
Do shorter days change how you feel? What small habits help you get through the darker months? Share a tip in the comments. Someone reading may need exactly your idea.
Sources and further reading
- NIMH: Seasonal Affective Disorder
- MedlinePlus: Seasonal affective disorder
- MedlinePlus Magazine: Falling back: Seasonal affective disorder
- 988 Suicide & Crisis Lifeline
Sources checked October 22, 2026. General education; individual care and coverage questions require an appropriate professional.
Related Health Hubs
Join the conversation 💬
This is your space. Share a tip that helped you, ask the question you have been wondering about, or cheer on someone going through the same thing. Your comment shows up right away, and no account is needed.
Our house rules (they keep this a feel-good spot): Be kind. Stay on topic. Keep it free of religion, politics, and anything hurtful. Comments that break these rules are removed.
Protect your privacy: Use a first name or nickname, and skip full names, phone numbers, and personal health details.
If you or someone you know is in crisis, call or text 988. In an emergency, call 911.