- Vaccination
- Vaginal atrophy (atrophic vaginitis)
- Vaginal cancer (tumor)
- Vaginal foreign body
- Vaginal yeast (fungal) infection
- Vaginitis (vaginal infection inflammation)
- Valvular heart disease (abnormal heart valves)
- Varicocele (testicular vein enlargement)
- Varicose veins
- Vascular insufficiency due to peripheral artery disease (PAD, claudication, inadequate blood flow)
- Vasculitis (inflammation of the arteries)
- Vasovagal syncope (fainting)
- Ventral hernia (bulging of the abdominal wall)
- Ventricular tachycardia (VT, dangerous irregular heart beat)
- Vertebral artery dissection (neck artery tear)
- Vertebral fracture (broken back or neck bone)
- Vertebral- basilar artery insufficiency (inadequate blood flow to the back of the brain)
- Vertebral-basilar stroke (stroke in the back of the brain)
- Vertigo (spinning sensation)
- Vesicovaginal fistula (connection between the bladder and vagina)
- Vestibular neuronitis (labyrinthitis, vertigo)
- Vibrio parahaemolyticus infection (bacterial infection from shellfish)
- Viral exanthem (rash from viral infection)
- Viral hemorrhagic fevers (Ebola, Lassa)
- Viral infections
- Vitamin B12 deficiency
- Vitamin D deficiency
- Vitiligo (loss of skin pigment)
- Vocal cord nodule (growth on the vocal cords)
- Vocal cord paralysis (voice box weakness)
- Volvulus (twisted intestine)
- Von Willebrand's disease
- Vulvar squamous cell carcinoma (skin cancer on female genitalia)