Mental Health Conditions and Disorders span the age spectrum and range in seriousness from mild to severe and even fatal.  There are several excellent internet resources to find out more about these conditions.  Here is list of websites:

www.psychcentral.com
The Internet's largest and oldest independent mental health network, providing
reliable, trusted information & self-help support communities.

www.nimh.nih.gov/index.shtml
The mission of NIMH is to transform the understanding and treatment of mental illnesses through basic and clinical research, paving the way for prevention, recovery and cure.

www.mentalhelp.net/
The Mental Help Net website exists to promote mental health and wellness education and advocacy.

www.mhselfhelp.org/
The Clearinghouse and the Mental Health Consumer Movement
The National Mental Health Consumers' Self-Help Clearinghouse, the nation's first national consumer technical assistance center, has played a major role in the development of the mental health consumer movement. The consumer movement strives for dignity, respect, and opportunity for those with mental illnesses. Consumers--those who receive or have received mental health services--continue to reject the label of "those who cannot help themselves.