Research suggests children with ADHD are more likely to have sleep disorders. These include insomnia, daytime sleepiness, and restless leg disorders.

Epididymitis is an inflammation or infection of the epididymis. This is a thin, coiled tube that sits on top of a male testicle. In younger boys, this condition can be caused by a urinary tract infection. In older boys and teens, it's often caused by a sexually transmitted infection (STI).

Scrotal swelling is a common problem in baby boys and young boys. It can have many causes. These are often divided into painless and painful scrotal swelling.

Roundworm infection is a type of parasitic illness. This is an illness in which an organism lives inside the body of another creature. The worms live and grow inside the body and may cause symptoms.

Internal abdominal injuries from blunt trauma are serious injuries that occur when the body hits or collides with a large object. These types of injuries are most common in contact sports like football, ice hockey, soccer, and lacrosse.

Stem cells are special human cells that have the ability to develop into many different cell types, from muscle cells to brain cells. In some cases, they also have the ability to repair damaged tissues.

If 1 of your blood vessels gets damaged, it sends out signals that are picked up by platelets. The platelets then rush to the site of damage and form a plug, or clot, to repair the damage.

Langerhans cell histiocytosis is a rare disorder that causes damage to tissues all over the body. Read on to learn about causes, symptoms, diagnosis, and treatments.

MRSA most often causes minor skin infections in young athletes. But if untreated, the bacteria may invade the bloodstream and become a life-threatening infection. Read on to learn more.

AFM is a rare condition that affects the nervous system.