People with this mental health condition do not want to be with others. They stay away from social activities. They're limited in how they express emotions.
Disease
Dissociative disorders
These mental health conditions involve experiencing a loss of connection between thoughts, memories, surroundings, actions and identity.
Disease
Reactive attachment disorder
Reactive attachment disorder is when an infant or young child doesn't establish healthy attachments with parents or caregivers due to neglect.
Disease
Delayed sleep phase
Learn more about this sleep condition that causes a delay in usual sleep patterns.
Disease
Sleep terrors (night terrors)
These are times of screaming or crying, intense fear, and sometimes waving arms and legs during sleep. The person often sits up in bed, looking scared.
Disease
Jet lag disorder
Jetting across time zones can take a toll on your body's internal clock. Find out how to cope with fatigue and other symptoms while traveling.
Disease
Narcolepsy
Learn more about this sleep condition that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Disease
Pediatric obstructive sleep apnea
This condition can cause your child's breathing to become partly or completely blocked many times during sleep. Get to know the symptoms and treatments.
Disease
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Disease
Supraventricular tachycardia
SVT is a heart rhythm disorder that causes a very fast or erratic heartbeat. The heart may beat more than 150 times a minute. Know the symptoms and when it's treated.
Disease
Aortic valve regurgitation
Learn more about the symptoms and treatment of this condition in which the heart's aortic valve doesn't close tightly.
Disease
Chest pain
Pain in the chest has many possible causes — and some are serious. Here's why it's so important to see a healthcare professional about chest pain.