Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Light Therapy

Treatment Overview

Light therapy is the main treatment for seasonal affective disorder (SAD). It's used for other conditions too. It is exposure to light that is brighter than indoor light but not as bright as direct sunlight.

The most common light therapy uses a special type of fluorescent light, called a light box. Light therapy is usually prescribed for about 30 minutes a day. You place the light box at a certain distance from you, on a desk or table. Then you sit in front of it while you read, eat breakfast, or work at a computer. Light therapy is usually started in the fall and continued through spring.

How Well It Works

Light therapy is an effective treatment for seasonal affective disorder (SAD) and other conditions. Many people feel better within days of using light in the morning.

If symptoms of depression do not improve, or if they become worse, it is important to follow up with your doctor or therapist.

Risks

Light therapy generally is safe, and you may use it together with other treatments.

The most common side effects of light therapy include:

  • Eyestrain or visual disturbances.
  • Headaches.
  • Agitation.
  • Fatigue.
  • Nausea.

You can relieve these side effects by decreasing the amount of time you spend under the light.

You may be tired during the first week because of changes in your sleep-wake patterns, but this will usually go away after about a week.

Do not use ultraviolet light, full-spectrum light, heat lamps, or tanning lamps for light therapy. People who have sensitive eyes or skin should not use light therapy without first talking with a doctor.

Credits

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC Staff

Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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