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Rasmussen syndrome is a form of childhood epilepsy that causes frequent, severe seizures. Long-term inflammation in one side

Raynaud's phenomenon is a condition in which some areas of the body have an exaggerated response to cold temperature or emotional

Razor bumps, or ingrown hairs, happen after you shave, when strands of hair curl back on themselves and grow into the skin. This

Rebound congestion is a constant nasal stuffiness (congestion) that develops from the overuse of nasal sprays (or drops or gels)

A medicine-overuse headache (sometimes called a rebound headache) is a type of chronic headache that can result from the overuse

The recommended dietary allowances (RDAs) are nutritional guidelines established and periodically reviewed by the United States

A rectal prolapse happens when part or all of the wall of the rectum slides out of place, sticking out of the anus. It may be a

A rectocele is a form of pelvic organ prolapse in which the rectum moves from its normal position and presses against the back

The rectum is a muscular tube about 5 in. (12.7 cm) long that is at the end of the large intestine (colon). The rectum connects

Rabies is a disease caused by a virus that can affect the nervous system (brain and spinal cord) of any kind of mammal, including