Detailed information on the most common types of mood disorders, including major depression, manic depression (bipolar disorder), dysthymia, seasonal affective disorder, and suicide

Bipolar disorder is a mood disorder. People with bipolar disorder switch between periods of mania and periods of depression. There is no cure, but medicine and therapy can help manage symptoms.

Detailed information on the most common types of anxiety disorders, including panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, generalized anxiety disorder, and phobias

Posttraumatic stress disorder is a debilitating anxiety that can affect people who have been through or seen a traumatic event. Counseling and medicine can help.

A phobia is an uncontrollable, irrational, and persistent fear of a specific object, situation, or activity. The fear experienced by people with phobias can be so great that some go to extreme lengths to avoid the source of their fear.

Many sports injuries can be prevented with proper conditioning and training, wearing appropriate protective gear, and using proper equipment.

Amenorrhea means you haven't had your period for more than 3 cycles. It can be caused by a variety of things including overexercising, being overweight, or due to an ovulation problem.

Rocky Mountain spotted fever (RMSF) is an infection caused by the bite of an infected tick.

Detailed information on prevention of infectious diseases

Read on to learn about common refractive errors, including astigmatism, nearsightedness, and farsightedness.