Early modern English medical books are full of advice about cleanliness of the skin, the subject of Chapter 4. It was considered vital for the survival of infants and insisted upon in books dedicated to childcare. Babies needed washing and/or bathing with every change of their nappy/diaper. Surgeons, responsible for the external health of the body, also recommended regular washing of the skin. Washing performed the necessary function of removing sweat, a form of excretion, as well as preventing and treating skin ailments such as the itch, morphew, and scabies. Bathing was considered a particularly effective method of cleaning the skin and the literature on this subject is examined and reassessed.