ichor- +

(Greek: fluid [distinct from blood] that flows through the veins of the gods; by extension, "watery part of blood or milk," used in the sense of "thin, serous or sanious fluid, especially from a wound or sore")

Cross references of word groups that are related, partially or extensively, to: "blister, bump, swelling": bull-; papulo-; pemphig-; puro-; pus-; pustu-; pyo-; suppurant-; tum-; vesico-; vesiculo-.