Ir al contenido principal
  • Español
American Heart Association Go Red for Women
American Heart Association Go Red For Women
  • Ataques cardíacos y síntomas de ACV en mujeres
  • Voluntario/a
  • TIENDA
  • DONAR AHORA
  • DONAR
  • site search Buscar
    Buscar
  • Las cardiopatías en las mujeres
  • Conozca su riesgo
  • Vida saludable
  • Etapas de la vida
  • Involúcrese
  • Acerca de nosotros
  • En su comunidad
  • Signos de alarma
  • Voluntario/a
  • TIENDA
    • English
    • Español

Understanding seasonal depression and how to cope with it

October
(Milan Markovic / E+ via Getty Images)

As winter draws near, our environment undergoes a major transformation — leaves fall, temperatures drop and daylight becomes shorter and shorter.

While some anxiously await the seasonal changes, millions of adults in the United States will undergo a form of depression during the winter months called seasonal affective disorder, or SAD. According to Thea Gallagher, a clinical associate professor in the department of psychiatry at New York University Grossman School of Medicine/NYU Langone, SAD can feel like regular depression, because it is.

Gallagher explained, "The only difference is the onset of this depression coordinates with the seasons. It usually starts in fall and winter when there is less light, less activity, colder temperatures and a changing schedule. And then it goes away in the spring, but it can come back every year around the same time."

According to the National Institute of Mental Health, a person may be diagnosed with SAD if they experience symptoms of major depression that occur seasonally for at least two consecutive years. Symptoms may include sleeping or eating too much, social withdrawal, persistent feelings of sadness or hopelessness, difficulty concentrating and a lack of energy.

Just how many people experience SAD has been difficult for researchers to pinpoint. Estimates vary from 1.4% to 9.7% of people living in North America, with rates for those living in the northernmost latitudes approaching up to 10%. It is more common in women.

It's unclear what causes SAD, though some studies suggest people who experience seasonal depression may have trouble regulating serotonin, a neurotransmitter that helps regulate mood and is affected by exposure to sunlight. Other studies suggest people with SAD produce too much of the hormone melatonin, which can increase sleepiness.

Both melatonin and serotonin are tied to how the body handles night-day cycles, or the body’s circadian rhythms. When levels are out of balance, it can be difficult for people to adjust to seasonal changes in the length of daylight. Vitamin D, which promotes serotonin activity and is produced when skin is exposed to sunlight, also may play a role.

Regardless of what's causing SAD, experts say what is clear is that depressive symptoms grow as winter approaches and lessen with the arrival of spring.

"One of the things that's unusual about SAD is that it's the only form of depression where we know the trigger, which is a lack of environmental light," said Robert Levitan, the Cameron Wilson chair in depression studies at the Centre for Addiction and Mental Health and a professor of psychiatry at the University of Toronto. "Most depressions are not as predictable. This predictability can help some individuals recognize symptoms and implement treatment quickly, though for others it can lead to weeks of negative anticipation as the fall approaches."

According to Levitan, not everyone with SAD experiences a severe depression. "There's a continuum," he said. "Some people just feel tired. They enjoy things less but can get to work and function. However, for some it is truly disabling."

Those who undergo seasonal depression may help ward it off by taking antidepressants as the weather begins to change, Gallagher said. Others may not experience depression strong enough to need medication, but they can take other preventive measures to offset symptoms.

Light therapy – exposing people to bright light every day to make up for the lack of natural light – has been shown to be effective, she said. Typically, this is done first thing in the morning for 30 to 45 minutes. The lights are about 20 times brighter than indoor lighting but filter out damaging UV light for safety. People with some eye diseases or who take medication that makes them extra sensitive to light may not be able to use light therapy.

Levitan said he encourages people who can't use light therapy to "go for a walk and get some of that natural light."

Getting out and seeing other people also can help, Gallagher said. "Recognize that as temperatures go down, there tends to be a lot less socializing planned," she said. "Plans happen more easily in the summer. So be intentional about socializing and self-care."

Psychotherapy, mindfulness to reduce stress and anxiety, and meditation can also help, she said.

Though less common, some people may experience SAD during the summer. Symptoms of summer-onset SAD include trouble sleeping, a loss of interest in eating, feeling restless, agitated or anxious, or in extreme cases having episodes of violent behavior.

Regardless of when SAD occurs, said Gallagher, it's important to take care of yourself.

“Have self-compassion," she said. "Remember that it's just something that happens, and you know you have to handle it."


X formerly known as Twitter Facebook LinkedIn Email Print

Beyond the Table

Beyond the Table
  • Stories
    • Sepsis is a serious but misunderstood heart threat
    • 10,000 steps a day: Uncovering the origin behind the popular walking goal
    • AED: a crucial tool in cardiac arrest
    • Beat the heat: Strategies to protect your heart and brain
    • Benefits of losing weight may abide even if pounds return
    • Cuff size matters in blood pressure readings
    • Do this and ward off both breast cancer and heart disease
    • Don’t ignore the quality of relationships when considering the link between good health and marriage
    • Eat healthier in 2023
    • Embrace the holiday spirit with these simple wellness strategies
    • Essential vitamins and minerals during pregnancy linked to reduced risk of high blood pressure
    • Expert tips to help avoid holiday stress and stay healthy
    • It’s American Heart Month: What every woman should know about heart health
    • Fish oil supplements may be more popular than beneficial
    • Healthy substitutions elevate holiday drinks
    • High blood pressure during pregnancy poses risks for mother and child
    • Secondhand smoke worse for children than many people think
    • How the Body Roundness Index offers new insights into cardiovascular risk
    • How to fit walking into any schedule
    • Is winter dehydration sneaking up on you?
    • It’s American Heart Month: What every woman should know about heart health
    • It's never too early for a healthy diet
    • Learn CPR and be prepared to save a life anywhere
    • Less salt leads the changes in school lunches
    • Let music step up your exercise program
    • Lifestyle changes key to reducing increased risks for heart disease as women age
    • Millions of U.S. households with children affected by food insecurity, survey finds
    • Nearly 1 in 4 young U.S. adults
    • Not just extra calories: Sugary drinks may boost risk of heart disease
    • Research confirms link between early menopause, higher ischemic stroke risk
    • Secondhand smoke worse for children than many people think
    • Sip and snack: The best foods to boost your hydration
    • Spring into a new exercise routine
    • Spring into better health
    • Study narrows focus on pregnancy complications and stroke
    • Study reveals lower cardiac rehabilitation attendance among Asian, Black and Hispanic adults
    • Not just extra calories: Sugary drinks may boost risk of heart disease
    • Summer boredom can spark creativity and learning through play in kids
    • Teens targeted by e-cig industry on new path to nicotine addiction
    • The fight against youth vaping: Programs, research and school strategies
    • There's a gender split in mini-stroke diagnosis
    • This volunteer does better by doing good
    • Understanding seasonal depression and how to cope with it
    • Weigh the benefits of a regular bedtime
    • What people with heart conditions should know now about COVID-19
    • Lend an ear: Why corn on the cob belongs at your cookout
    • Women and men are (not quite) equals on heart transplants
    • Prioritizing care for others, women often neglect their own health
    • Women's quality of life after stroke is worse than men — age may be a major factor.

CVS Health es un orgulloso promotor nacional del movimiento Go Red For Women de la American Heart Association.
Goredforwomen.org/es es posible gracias al generoso apoyo del Fondo Adriana Gallardo Legacy para la salud de la mujer.

* La American Heart Association revisó y aprobó toda la información médica y de salud de este sitio web conforme a investigaciones científicas y a las directrices de la American Heart Association. Obtenga más información sobre nuestro proceso editorial de contenido.

American Heart Association

National Center
7272 Greenville Ave.
Dallas, TX 75231

Customer Service
1-800-AHA-USA-1
1-800-242-8721

Contact Us

Hours
Monday - Friday: 7 a.m. – 7 p.m. CT 
Saturday: 9 a.m. - 5 p.m. CT
Closed on Sundays

Tax Identification Number
13-5613797

Acerca de nosotros

  • Acerca de la AHA/ASA
  • Informe anual
  • Información financiera de la AHA
  • Carreras
  • Programas internacionales
  • Últimas noticias sobre salud cardíaca y derrames cerebrales
  • Sala de prensa de la AHA/ASA

Involúcrese

  • Donar ahora
  • Haga un regalo conmemorativo
  • Defensa
  • Distintas formas de donar
  • Voluntario/a
  • ShopHeart
  • ShopCPR

Nuestros centros

  • American Heart Association
  • American Stroke Association
  • RCP y ACE
  • Noticias sobre salud cardíaca para profesionales
  • Más sitios
  • Facebook
  • Instagram
  • Threads
  • X formerly known as Twitter
  • YouTube
  • Tik Tok
  • LinkedIn
  • Pinterest
  • National Health Council
  • Better Business Bureau Accredited Charity
  • Charity Navigator
  • Secured by Sectigo
×
American Heart Association

Estevínculo solo se proporciona para mayor conveniencia y no constituye una aprobación de la entidad vinculada ni de ningún producto o servicio.

Continuar
  • Carreras profesionales en la AHA
  • Política de privacidad
  • Renuncia de responsabilidad de recomendaciones médicas
  • Declaración de accesibilidad
  • Política de derechos de autor
  • Política de ética
  • Política sobre conflictos de intereses
  • Política de enlaces
  • Whistleblower Policy
  • Pautas de contenido editorial
  • Proveedores
  • Avisos de recaudación de fondos estatales


©2025 American Heart Association, Inc. All rights reserved. Unauthorized use prohibited.
The American Heart Association is a qualified 501(c)(3) tax-exempt organization.
*Red Dress ™ DHHS, Go Red ™ AHA ; National Wear Red Day® is a registered trademark.