Abnormal blistering of the skin UMLS:C2220104 Blister A bulla is a large vesicle described as a rounded or irregularly shaped blister containing serous or seropurulent fluid, equal to or greater than 10mm. peter HP:0200038 Blistering, generalized Skin bullae UMLS:C2132198 HP:0007496 The presence of one or more bullae on the skin, defined as fluid-filled blisters more than 5 mm in diameter with thin walls. Skin blisters HP:0007467 human_phenotype UMLS:C0241054 HP:0008066 Abnormal blistering of the skin Blisters 2008-04-02T03:54:00Z Abnormality of skin morphology