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.

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.

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.

Pain may start as a minor tweak or a twinge. At first it may hurt only when you move a certain way, but it soon morphs into a chronic pain. From knees to shoulders to elbows to ankles and every other body part, an active lifestyle makes it likely that you’ll experience inexplicable aches or pains.

When you finish lacing up your running shoes and stretching the hami's don't forget about your shoulders. Running is a whole body exercise -- you are pumping your arms, cranking your torso and pounding your feet on the ground.

Tingling pains in the foot can be a sign of serious disease or a precursor to long-term problems from something as easy to fix as changing your shoes.

When you are climbing stairs or crossing your legs, you may feel pain due to an underlying medical disorder or injury. Contact your doctor about the pain and let him know about any other symptoms you are having.

Pain of any kind is worthy of your attention. Pain is your nervous system informing your brain that something is wrong. If you are experiencing sharp heel pain when bending, a few issues should be considered that may help you to decipher what type of help your body needs.

Leg pain has a number of causes, from exercise to nerve damage caused by an injury or diabetes. It may also be the result of a condition known as restless leg syndrome -- or RLS.

A fever in a child with allergies is most likely the effect of a secondary infection. Allergies never cause a child’s body temperature to rise, according to MayoClinic.com. Some symptoms of an allergic reaction can cause mucus build up in different parts of the child’s body, leading to an infection.

Percocet is a class II prescription drug, prescribed as a pain reliever for moderate to high acute pain. It comes in six different strengths. The main active ingredients of Percocet are oxycodone and acetaminophen. This blend classifies Percocet as a narcotic analgesic, and is considered a highly addictive painkiller.