You can develop back pain for many reasons, but some causes are more common than others. Wear and tear on the bones that form your spine (called vertebrae), muscles, and other tissues in your back can ...

Abdominal pain refers to discomfort or other uncomfortable sensations that you feel in your belly area. Just about everybody, at one time or another, will get a bellyache. Most causes of abdominal ...

You may have a reduced appetite due to infections, some mental health conditions, medical conditions, or taking certain medications. A reduced appetite occurs when you have a decreased desire to eat.

An arrhythmia is an irregular heartbeat that may feel like a racing or fluttering heart. It is not always serious but can sometimes indicate a potentially fatal heart problem. Arrhythmias — sometimes ...

Confusion is a symptom that makes you feel as if you can’t think clearly. You might feel disoriented and have a hard time focusing or making decisions. Confusion is also referred to as disorientation.

In 2016, children and adolescents (1 to 19 years of age) represented a quarter of the total estimated U.S. population 1; reflecting relatively good health, they accounted for less than 2% of all U.S.

A delusion is a belief based on an inaccurate interpretation of reality, despite clear evidence to the contrary. A delusional disorder causes a person to have delusional thoughts for a prolonged ...