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Polycythemia vera (PV) occurs when your body makes too many red blood cells. This can cause blood clots and lead… What is polycythemia vera? Polycythemia vera (PV) is a rare disease that causes your body to make too many red blood cells. Your blood may become too thick…

An ACL injury is the overstretching or tearing of the anterior cruciate ligament in your knee. It is a common… What is an ACL injury? ACL refers to the anterior cruciate ligament. It is 1 of 4 ligaments in your knee. The other knee…

Stuttering is a condition that affects a person’s ability to speak smoothly. It can cause them to repeat words, parts… What is stuttering? Stuttering is a condition that affects a person’s ability to speak smoothly. It can cause them to repeat words, parts of…

Sudden infant death syndrome is the unexplained reason a baby under 1 year old dies while sleeping. There are no… What is sudden infant death syndrome (SIDS)? Sudden infant death syndrome (SIDS) is the unexplained reason a baby under the age of 1 dies…

Gastroenteritis is a medical term for a stomach virus. Many people call it the stomach flu. It can strike anyone… What is a stomach virus? Gastroenteritis is a medical term for a stomach virus. Many people call it the stomach flu. It is not…

Tick-borne relapsing fever (TBRF) is a bacterial infection spread by ticks. It shows up as repeated episodes of fever, headaches,… What is tick-borne relapsing fever? Tick-borne relapsing fever (TBRF) is a bacterial infection spread by ticks. The infection normally shows up as repeated episodes…

Syphilis is a serious infection passed from one person to another through sexual contact. It is caused by a bacteria… What is syphilis? Syphilis is a serious infection passed from one person to another through sexual contact. It is caused by a bacteria (germ)…

A sty is a painful, red bump that forms on the edge of your eyelid. It may look like an… What is a sty? A sty is a painful, red bump that forms on the edge of your eyelid. It may look like an…

Spina bifida is a birth defect that happens when a baby’s spine and spinal cord don’t close completely during… What is spina bifida? Spina bifida is a birth defect that happens when a baby’s spine and spinal cord don’t close completely during development. This…

Sever’s disease is a common heel injury that occurs in children. It is painful and caused by swelling of the… What is Sever’s disease? Sever’s disease is a common heel injury that occurs in children. It is painful and caused by swelling of the…

Scoliosis is an abnormal curve of the spine (backbone). Normally, the spine is straight. With scoliosis, the spine is crooked… What is scoliosis? Scoliosis is an abnormal curve of the spine (backbone). Normally, the spine is straight. With scoliosis, the spine is crooked and…

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

Pseudogout is a type of arthritis that causes painful swelling in one or more of your joints. It can lead… What is pseudogout? Pseudogout is a type of arthritis that causes painful swelling in one or more of your joints. It can lead to…

A peptic ulcer is a raw area in the stomach or near the top of the small intestine. The lining… What is peptic ulcer disease? A peptic ulcer is a sore or raw area in the lining of the stomach. It also can occur…

Pleurisy is a medical condition that affects the lining of your lungs and chest, which can become irritated with the… What is pleurisy? Pleurisy is a medical condition that affects the lining of your lungs and chest. The lining can become inflamed or irritated…

Pica is a compulsive eating disorder in which people eat nonfood items. Dirt, clay, and flaking paint are the most… What is pica? Pica is a compulsive eating disorder in which people eat nonfood items. Dirt, clay, and flaking paint are the most common…

Ovarian cancer is cancer in one or both ovaries. Ovaries are small organs located on each side of a women’s… What is ovarian cancer? Ovarian cancer is cancer in one or both ovaries. Ovaries are small organs located on each side of a women’s…