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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.

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).

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

Giving sweets, chips, or soda as a reward often leads to children overeating foods that are high in sugar, fat, and empty calories. Worse, it interferes with kids’ natural ability to regulate their eating, and it encourages them to eat when they’re not hungry to reward themselves.

Red blood cells play an important role in your health by carrying fresh oxygen all over the body.

Think of white blood cells as your immunity cells. In a sense, they are continually at war. They flow through your bloodstream to battle viruses, bacteria, and other foreign invaders that threaten your health.

White blood cells, red blood cells, and platelets are essential to body function, but plasma also plays a crucial, and mostly unrecognized, job. It carries these blood components throughout the body as the fluid in which they travel.

Blood-clotting disorders are a group of conditions in which there is too much clotting. They are often inherited.

Dyskeratosis congenita is a rare disease that's present at birth. Learn more about the causes, symptoms, diagnosis, treatment, and complications.