Pain and swelling affecting only one lower leg most often occur because of an injury to the leg or a medical condition that affects just that leg. Several conditions, many of which are serious, can produce these symptoms.

Dangerous complications of infectious sinusitis are rare but potentially life threatening. Signs and symptoms affect the eyes, facial bones and nervous system.

Penicillin and amoxicillin are more alike than different, but there are minor differences between these drugs, including indications for use, form and dosing.

The normal range for white blood cell (WBC) count for a child varies according to age and, at certain ages, the sex of the child.

Small skin abscesses or boils typically need to drain in order to heal. Home remedies, especially warm compresses, can speed this process.

Side effects after gallbladder removal can be immediate and related to the surgery, or long term and linked to physical changes or pre-existing conditions.

Infants are susceptible to fevers and low body temperature. Normal temperature ranges vary, depending on the method used for taking the baby's temperature.

Hairline fractures, so named because they look like a piece of hair on x-ray, can affect any of the wrist bones. They are small cracks in the bone that do not cause the bone pieces to separate.

Blood clots in the stool usually signal bleeding in the colon. Common causes include diverticular bleeding and colitis, among others.

Black stools occur for various reasons, the most serious being upper digestive tract bleeding. But certain foods, medicines and supplements might be to blame.

It's important to understand the common signs of a stroke, and to ensure anyone with these symptoms seeks immediate medical attention.

The brown recluse is a spider found almost exclusively in the southwestern and midwestern United States. As its name suggests, the brown recluse tends to reside in hidden areas, such as closets, attics, barns, and piles of rocks or wood. It is a poisonous spider, releasing a toxic venom into the skin during each bite.