"'Tis a most grievous affliction of the skin, young master, that will leave you pockmarked and more gruesome even than you are now -"
— Portrait of a Healer at St. Mungo's
A highly contagious magical malady that causes purple pustules to develop on the skin which may leave pockmarks (DH6, OP23). A sub-strain of the disease, Cerebrumous Spattergroit, causes severe confusion and memory impairment (Pm:QWC).
- A portrait of a medieval Healer told Ron he had Spattergroit when he went to visit his father at St. Mungo's. In fact, he was looking at Ron's freckles (OP23).
- The portrait advised that the cure for Spattergroit would be to stand naked in a barrel of eels eyes at the full moon with a toad's liver bound about one's throat (OP23).
- When Ron left to hunt for Horcruxes, the Weasley family transformed the ghoul in the attic to look like Ron with Spattergroit to explain his absence from school (DH6).
- Cerebremous Spattergroit was one of the theories explaining why nobody can remember the 1877 Quidditch World Cup (Pm:QWC).