Can light therapy for seasonal affective disorder cause side effects?

Yes, light therapy for seasonal effective disorder (SAD) can cause some side effects, although they are generally mild. Some common side effects include:

Eye strain: Bright light can cause eye strain, especially if you are not used to it. To minimize this, start with short sessions and gradually increase the duration as your eyes adjust. You can also use lubricating eye drops to help with dryness.

Headaches: Some people experience headaches, particularly in the beginning stages of light therapy. These headaches usually go away within a few days.

Insomnia: Light therapy can affect your circadian rhythm, which can lead to insomnia or difficulty sleeping. To avoid this, it's important to use light therapy only in the morning or early afternoon.

Mood changes: Some people may experience mood swings or irritability with light therapy. If this occurs, talk to your doctor.

Nausea: In rare cases, light therapy can cause nausea. If this occurs, stop using the therapy and talk to your doctor.

It's important to note that not everyone experiences side effects with light therapy. Most people tolerate it well and find it to be an effective treatment for SAD. If you are experiencing side effects, talk to your doctor about ways to minimize them or whether light therapy is right for you.