(pathology) an elevation of the skin filled with serous fluid
a small white spot on the tip of the nipple that looks like a tiny, milk-filled blister
A small, thin-walled, air-containing structure. This term is frequently reserved for such small areas which are frequently intrapleural. This term may be used synonymously with "bulla" but often is reserved for smaller air spaces.
Allows fluid to filter from the eye following glaucoma surgery.
A bleb is a large blister filled with serous fluid. Blebs can form on a number of tissues due to different pathologies, including frostbitten tissues and damaged cell membranes. In ophthalmology, blebs may be formed intentionally in the treatment of glaucoma.