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Ulcer
An ulcer is an open sore in the lining of the stomach or the upper part of the small intestine. A gastric…
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Ulcerative Colitis
Ulcerative colitis is a chronic inflammatory bowel disease that affects the inner lining of the rectum and colon. Inflammation can cause small…
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Umbilical Hernia
An umbilical hernia is a bulge that develops when tissue pushes through a weak spot in the abdominal wall near the belly…
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Urethritis
Urethritis is inflammation of the urethra, the tube that carries urine out of the body. Infections, including some sexually transmitted infections, are…
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Urinary Retention
Urinary retention means you cannot empty your bladder fully or cannot urinate at all. It may happen suddenly, which is called acute…
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Urinary Tract Infection
A urinary tract infection (UTI) is an infection in part of the urinary system, which includes the kidneys, ureters, bladder, and urethra.…
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Uterine Fibroids
Uterine fibroids are common, noncancerous growths that develop from the muscle of the uterus. A person may have one fibroid or several,…
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Vaginal Infection
A vaginal infection is an imbalance, inflammation, or infection affecting the tissues of the vagina. Common causes include yeast overgrowth, bacterial vaginosis,…
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Vaginitis
Vaginitis is inflammation or irritation in and around the vagina. It can be caused by infections, such as bacterial vaginosis, yeast infections,…
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Variably Protease Sensitive Prionopathy
Variably protease sensitive prionopathy (VPSPr) is a rare, progressive neurodegenerative disorder caused by abnormal prion protein building up in the brain. It…
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Varicocele
A varicocele is a group of enlarged veins in the scrotum, the skin sac that holds the testicles. It often develops on…
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Varicose Veins
Varicose veins are enlarged, twisted veins close to the surface of the skin. They usually develop in the legs when one-way valves…
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Vasculitis
Vasculitis is inflammation of one or more blood vessels. Swelling can narrow or block blood flow, affecting tissues and organs supplied by…
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Ventricular Septal Rupture
Ventricular septal rupture is a tear in the wall, or septum, between the heart’s two lower chambers. The tear allows blood to…
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Ventricular Tachycardia
Ventricular tachycardia is an abnormally fast heart rhythm that starts in the heart’s lower chambers, called the ventricles. This ventricular arrhythmia can…
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Viral Hepatitis
Viral hepatitis is inflammation of the liver caused by hepatitis viruses. The main types are hepatitis A, B, C, D and E.…
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Vitamin A Deficiency
Vitamin A deficiency occurs when the body does not have enough vitamin A to support normal health. Vitamin A helps maintain vision,…
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Vitamin B12 Deficiency
Vitamin B12 deficiency occurs when the body does not have enough vitamin B12 to support normal health. Inadequate B12 can impair red…
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Vitiligo
Vitiligo is an autoimmune condition in which the immune system damages or destroys melanocytes, the cells that make skin pigment. This causes…
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Vocal Cord Nodules
Vocal Cord Nodules are noncancerous, thickened areas that develop on the vocal folds inside the larynx. They can prevent the vocal folds…
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Water Intoxication
Water intoxication, also called water poisoning or water toxicity, occurs when a person drinks or retains more water than the body can…
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Whooping Cough
Whooping cough is a contagious bacterial respiratory illness caused by Bordetella pertussis, which infects the airways. It can affect people of any…
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Wilms Tumor
Wilms tumor, also called nephroblastoma, is a rare cancer that usually begins in one kidney in young children. It is one of…
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Wolff-Parkinson-White Syndrome
Wolff-Parkinson-White syndrome, also called WPW syndrome, is a heart rhythm condition caused by an extra electrical connection in the heart. This accessory…
