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Testicles are part of the male body. They usually move from inside the body to the scrotum at birth. If…

A thyroid nodule is a lump in the thyroid gland in your neck. More than 90% of them are not…

Stomach cancer is the growth of cancer cells in the lining and wall of the stomach. It’s also called gastric…

Shingles is a painful skin rash. It is also called zoster or herpes zoster. It is caused by the same…

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

Infertility means a couple isn’t able to become pregnant after 1 year of having regular, unprotected sex. Infertility can affect…

Polycythemia vera (PV) occurs when your body makes too many red blood cells. This can cause blood clots and lead…

An ACL injury is the overstretching or tearing of the anterior cruciate ligament in your knee. It is a common…

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

Sudden infant death syndrome is the unexplained reason a baby under 1 year old dies while sleeping. There are no…

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

Syphilis is a serious infection passed from one person to another through sexual contact. It is caused by a bacteria…

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…

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…

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

A peptic ulcer is a raw area in the stomach or near the top of the small intestine. The lining…