Mood disorders include depressive disorders and bipolar disorders. These types of psychiatric disorders affect a person’s emotions and may cause severe lows, called depression, and highs, called mania ...

Obsessive-compulsive disorder (OCD) occurs when obsessions (persistent, unwanted thoughts) trigger anxiety, causing you to repeatedly engage in compulsions (specific behaviors) to find relief. These ...

Tic disorders are conditions featuring sudden, non-rhythmic movements or vocalizations. A formal tic disorder diagnosis is determined by tic frequency, duration, and type. Tics are non-rhythmic ...

The term “rare blood disorders” describes less common conditions that affect blood cells’ ability to function correctly. Myeloproliferative disorders and lymphoproliferative disorders are two types of ...

Immune system disorders in children include primary (inherited) and secondary (acquired) immunodeficiencies, autoimmune diseases, atopic diseases, and immune-mediated inflammatory disorders. Share on ...

There are currently six eating disorders recognized in the DSM-5: anorexia nervosa, bulimia nervosa, binge-eating disorder, pica, rumination disorder, and avoidant/restrictive food intake disorder.

Bipolar disorder is a long-term mood disorder characterized by major fluctuations in mood — both high and low — that can impact daily functioning and behavior. Although bipolar disorder is a chronic ...

In schizoaffective disorder, you’ll experience both mood episodes (mania, hypomania, or depression) and psychotic symptoms (hallucinations and delusions). The distinguishing factor is that to be ...

More than 50 million Americans have a sleep disorder. Insomnia is the most common sleep disorder. Sleep apnea can cause breathing to stop 30 or more times in one hour. More than 50 million Americans ...