Oral ulcer white can squeeze

The white substance on the surface of oral ulcers is the pseudomembrane covered by the ulcer surface. The pseudomembrane is mainly formed by the accumulation of inflammatory exudation cellulose, necrotic exfoliated epithelial cells and inflammatory cells. The pseudomembrane is not the tissue itself, so it can be wiped off or torn off. The false membrane covering the ulcer site will make the ulcer site in a closed environment, not only conducive to the breeding of bacteria, the accumulation of toxic substances, but also the false membrane will gradually become thicker, affecting the direct contact and absorption of drugs in the damaged area, which is not conducive to drug treatment. Therefore, before local drug treatment, it is best to tear off the false membrane, which is not only conducive to drug efficacy, but also reduces the occurrence of secondary infection.