| Urticaria/Hives Detailed information on urticaria, also called hives, including what food and medicines commonly cause hives |
| Ulcerative Colitis Detailed information on ulcerative colitis, including symptoms, causes, diagnosis, and treatment |
| Underactive Adrenal Glands/Addison's Disease Detailed information on Addison's disease, the result of an underactive adrenal gland, including symptoms, diagnosis, and treatment |
| Usher Syndrome Detailed information on Usher syndrome, including types, diagnosis, and treatment |
| Uterine Fibroids Some estimates say that 20 to 50 percent of women of reproductive age have fibroids, although not all are diagnosed. In most cases, fibroids are benign. |
| Uterine Cancer Cancer of the uterus usually occurs around the time menopause begins. The occasional reappearance of bleeding should not be considered simply part of menopause, but should be checked by a doctor. |
| Upper Respiratory Infections Detailed information on upper respiratory infections, upper respiratory infections symptoms, upper respiratory infections treatment |
| Urogenital Disorders Detailed information on the most common urogenital disorders, including bladder cancer, cystocele (fallen bladder), hematuria, blood in the urine, impotence, erectile dysfunction, interstitial cystitis, male factor infertility, prostate disease, benign prostatic hyperplasia, BPH, prostate cancer, urinary incontinence, urinary tract infection, vesicoureteral reflux |
| Urinary Conditions Detailed information on the most common urinary conditions for women, including urinary incontinence, urinary tract infections, and interstitial cystitis |
| Unintentional Injury Statistics Statistics relating to unintentional injuries |