Many people automatically think of Alzheimer’s disease when they hear the word “dementia.” While Alzheimer’s is the most common type, there are multiple kinds of dementia. Below, doctors explain ...

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 ...

It's been a gnarly year for ticks already in the U.S., but the ticks you're seeing will vary depending on where you live.

The exact cause of personality disorders is unclear. However, genetics, neurological differences, and environmental factors may contribute to the development of these complex mental health conditions.

Immune system disorders in children can involve an underactive, overactive, or misdirected immune response. Main groups include immunodeficiencies, autoimmune diseases, atopic diseases, and ...

The theory of types of borderline personality disorder (BPD) is controversial. There is some debate over whether there are various types and what those types may be. BPD is a mental health condition ...

Hyperarousal plays an important role in mental disorders. It influences the severity of insomnia, depression, anxiety, post-traumatic stress disorder (PTSD), and ADHD. Yet it is striking that ...

People with Bipolar I disorder have full-blown manic attacks and deep, paralyzing depressions. A World Health Organization survey found the prevalence rate of bipolar I disorder to be 0.6 percent.

Functioning brain cells need a functioning system for picking up the trash and sorting the recycling. But when lysosomes, the cellular sanitation machines responsible for those tasks, break down or ...