What Is Seasonal Affective Disorder?
7. Diagnosis
The American Psychiatric Association uses a reference book called the Diagnostic and Statistical Manual of Mental Disorders that lists criteria for different mental health conditions. A doctor or psychologist may use these criteria to assess your symptoms and determine if you have SAD or another condition. You may be asked to fill out a questionnaire describing your symptoms.
Physical conditions can also cause symptoms of depression.2https://www.hopkinsmedicine.org/health/conditions-and-diseases/seasonal-affective-disorder Your doctor may perform lab tests to see if a medical condition such as a thyroid problem may be causing or contributing to your symptoms.
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