can be devastating to family relationships, friendships, and the
ability to work or go to school. Symptoms of depression vary a
great deal from person to person. Some people have only a few
symptoms, while others have many. Symptoms can change over time
and may include: - Persistent feelings of sadness, emptiness, or
hopelessness - Feeling guilty, worthless, or helpless - Loss of
interest in hobbies and activities - Loss of interest in sex -
Feeling tired - Trouble concentrating, remembering, or making
decisions - Trouble sleeping, waking up too early, or
oversleeping - Eating more or less than usual - Weight gain or
weight loss Restlessness, irritability, or - Physical symptoms
that defy standard diagnosis and do not respond well to medical
treatments - Thoughts of death or suicide (with or without
suicide attempts) Depression often coexists with other
conditions. The stress of coping with the disease may cause
depression. Or depression may be caused by the disease itself or
by drugs used to treat the diseas