- Ulcerative colitis
- Ultrasound
- Ultrasound – pregnancy
- 不够甲状腺
- Urethritis
- Urinary catheters
- Urinary problems – men
- Urinary tract infection (UTI) in children
- Urinary tract infection (UTI) in men
- Urinary tract infection (UTI) in pregnancy
- Urinary tract infection (UTI) in women
- Urine testing
- Urticaria
- Uterine cancer
- Uveitis