(T)
Tetanus - Infectious fever characterized by high fever, headache and dizziness
Thrombosis - Blood clot inside blood vessel
Thrush - Childhood disease characterized by spots on mouth, lips and throat
Tick fever - Rocky mountain spotted fever
Toxemia of pregnancy - Eclampsia
Trench mouth - Painful ulcers found along gum line, Caused by poor nutrition and poor hygiene
Tussis convulsiva - Whooping cough
Typhus - Infectious fever characterized high fever, headache, and dizziness

(V)
Variola - Smallpox
Venesection - Bleeding
Viper's dance - St. Vitus Dance

(W)
Water on brain - Enlarged head
White swelling - Tuberculosis of the bone
Winter fever - Pneumonia
Womb fever - Infection of the uterus.
Worm fit - Convulsions associated with teething, worms, elevated temperature or diarrhea

(Y)
Yellowjacket - Yellow fever.