显微镜下，假膜由炎细胞、坏死的上皮细胞和有微生物过度生长的黏液组成，黏膜下显示的是充血而完整的血管。
Microscopically, the pseudomembrane is seen to be composed of inflammatory cells, necrotic epithelium, and mucus in which the overgrowth of microorganisms takes place. The underlying mucosa shows congested vessels, but is still intact.
