Depression is a very serious illness Although we often say we are depressed when we are sad, clinical depression is a biological illness. The symptoms of depression vary greatly and are characterized by a change in their person's functioning (such as sleep disturbances: too much or not enough, changes in appetite: too much or not enough, changes in energy level: agitation or fatigue/lethargy, 'racing thoughts', difficulty concentrating, etc.). They may either feel sad, guilty and hopeless or may simply lose pleasure in life, lose sex drive or interest or even interest in things of value to them, such as family, work, religion, usual activities or hobbies. In children, especially, depression my seem to be agitation. Some people may feel so bad they begin to think of suicide or wish they could die. Depression may be helped with medication from your physician or psychiatrist. "Talk therapy" is also extremely effective to address the issues involved. A therapist and physician or psychiatrist are able to more effectively 'coordinate care' for the client if the client provides permission for these individuals to communicate regarding the treatment goals.
There are many things people can do to prevent depression from becoming too severe, such as diet, sleep and exercise. Your therapist will help you deal with this illness as quickly as possible so there is always hope.