Exudative diathesis means “go out” in Latin. Major contributions in this problem investigation were made by M.S. Maslov, G.N. Speranski, J.F. Dombrovskaya, V.A. Tabolin and etc. It should be emphasized that M.S. Maslov has devoted 30 years of his life to the diathesis study. He identified eight varieties of it, out of which the most common are exudative, lymphohypoplastic, and neuro-arthritis ones.