Rosacea (pronounced “row-zay-sha”) is a common inflammatory skin condition that causes redness on your face or other parts of your body, including your eyes. Different types of the condition can cause pimples and swelling on your skin. This is a lifelong condition without a cure. What are the types of rosacea? Four different types of rosacea include: Erythematotelangiectatic: Rosacea is …

Ringworm of the body (tinea corporis) is a rash caused by a fungal infection. It’s usually an itchy, circular rash with clearer skin in the middle. Ringworm gets its name because of its appearance. No wo Ringworm of the body is related to athlete’s foot (tinea pedis), jock itch (tinea cruris) and ringworm of the scalp (tinea capitis). Ringworm often …

Rickets is a childhood disease where your child’s bones are too soft, causing their bones to warp, bend and break more easily. Rickets is different from osteomalacia, which is a similar condition seen in adults. The difference between the two is that rickets happens only in children because their bones are still growing, which causes the classic symptom of bowed or …

Rheumatic fever is a rare autoimmune disease that causes inflammation of your child’s tissues and organs. Healthcare providers also call it acute rheumatic fever. The condition occurs when your child’s immune system overreacts to an untreated strep throat or scarlet fever infection. Strep throat and scarlet fever are both bacterial infections caused by group A Streptococcus. If your child doesn’t receive treatment for these infections, their immune …

Rhabdomyosarcoma is a rare type of cancer known as soft tissue sarcoma. It develops in your skeletal muscles. Rhabdomyosarcoma mostly affects children and teenagers but can affect adults as well. Each year, between 400 and 500 people in the U.S. receive a diagnosis of rhabdomyosarcoma. There are different types of rhabdomyosarcomas, some of which are aggressive and more difficult to treat. In …

Reye’s syndrome is a rare condition that causes your brain to swell and your liver to lose function after a viral illness or infection like the flu or chickenpox. It’s most common among children who take aspirin to treat symptoms during a viral infection or illness. The condition develops up to one week after the onset of a viral illness. Who does Reye’s syndrome affect? …

Rett syndrome is a rare neurodevelopmental (brain and nerve) disorder. Children with Rett syndrome appear to develop typically in the first year of life, but they lose the ability to use their hands purposefully. Other development then slows as they get older. Rett syndrome causes developmental challenges throughout childhood. As children get older, these challenges stop progressing but do not …

Retrograde ejaculation is a term that refers to semen going backward into your bladder instead of out of your body through your urethra and the tip of your penis during sexual climax. The urethra is the tube that lets urine and sperm leave your body. Retrograde ejaculation is also called dry orgasm. It can be a factor in infertility. Who does retrograde ejaculation …

Retinal diseases are those that affect your retina, or the back layer of your eye. Light goes into your eye through your cornea and through the opening at the center of your iris called the pupil. Your lens focuses the light onto your retina. Your retina is the part of your eye that’s responsible for converting light into electrical signals. Then, your …

Restless legs syndrome (RLS) is a brain, nerve and sleep condition that causes a strong, nearly irresistible urge to move your legs that’s at least partially relieved by movement. Symptoms are more common when your body is at rest in the evening. It usually occurs in addition to uncomfortable sensations in your legs like throbbing or aching. The urge to constantly move can …