Diseases and Conditions

Raynaud’s disease is a rare condition that narrows your blood vessels. It causes your fingers or toes to turn color…

Reactive arthritis occurs when your immune system reacts to an infection somewhere else in your body. It can affect your…

Only 1% of women experience multiple miscarriages. They can be caused by health conditions including chromosome defects and uterus…

Acid reflux occurs when acid from your stomach backs up into your throat. It can be caused by many factors…

Learn why your child may get several infections while he or she is still young.

Restless legs syndrome is a condition in which your legs feel very uncomfortable when you’re sitting or lying down. It…

Reye’s syndrome is a rare but serious illness common in children recovering from a virus and taking aspirin. It can…

Rheumatic fever is a rare disease. It usually doesn’t happen in the United States. It’s tied to the bacteria that…

Rheumatoid arthritis (RA) is a chronic (lasting) inflammatory disorder. It causes swelling and pain in the lining of your…

Rickets is a rare disorder that affects children’s bones, causing them to soften and break easily.

Ringworm is a skin infection that makes a rash shaped like a ring. The rash can occur different places on…

Rosacea is a common skin condition that occurs on the face. It causes redness and small bumps that are similar…

Rotavirus is a highly contagious infection commonly affecting babies and young children. A rotavirus vaccine offers some, but not full,…

Respiratory syncytial virus (RSV) is a common virus. It affects your lungs, making it difficult to breathe. The virus is…

Older adults (above the age of 60) are at higher risk for severe RSV infection. This is especially true if…