Blains
violent ulcerous inflammations, the sixth plague of Egypt, Ex 9:9,10 and hence called in De 28:27,35 "the botch of Egypt." It seems to have been the black leprosy, a fearful kind of elephantiasis.
Bibliography Information Smith, William, Dr "Definition for 'Blains' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.