Major depression is manifested by a combination of symptoms (see symptom list) that interfere with the ability to work, study, sleep, eat, and enjoy once pleasurable activities. Such a disabling episode of depression may occur only once but more commonly occurs several times in a lifetime.
A less severe type of depression, dysthymia, involves long-term, chronic symptoms that do not disable, but keep one from functioning well or from feeling good. Many people with dysthymia also experience major depressive episodes at some time in their lives.
Symptoms
* Persistent sad, anxious, or "empty" mood
* Feelings of hopelessness, pessimism
* Feelings of guilt, worthlessness, helplessness
* Loss of interest or pleasure in hobbies and activities that were once enjoyed, including sex
* Decreased energy, fatigue, being "slowed down"
* Difficulty concentrating, remembering, making decisions
* Insomnia, early-morning awakening, or oversleeping
* Appetite and/or weight loss or overeating and weight gain
* Thoughts of death or suicide; suicide attempts
* Restlessness, irritability
* Persistent physical symptoms that do not respond to treatment, such as headaches, digestive disorders, and chronic pain
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here. but as wat reachme2003 said, it'd be better if your friend went to see a GP first and if needed, the GP will refer your friend to a psychiatrist/psychologist. but my lecturers specialise in child psychology else i'd have given you their contact.
hope your friend gets better!
