Chronic stomatitis is mainly divided into three categories: first, herpetic stomatitis, the main symptom is the appearance of a lot of dense patches of small blisters in the mouth, small blisters of blisters with a very thin wall, in the blisters soon after the blisters will appear blisters rupture, leaving the red, swollen and bleeding ulcerated surface. Secondly, bacterial stomatitis caused by bacterial infection will make the oral mucosa appear red, swollen, ulcerated, yellowish-white pseudomembrane will appear on the surface of the ulceration, and even many oral ulcers will occur in the mouth, accompanied by severe pain. Third, is due to Candida albicans infection caused by fungal stomatitis, fungal stomatitis, the main symptom is the appearance of white patches in the mouth, or white pseudomembrane, white patches and pseudomembrane is difficult to wipe clean, and the oral mucosa will have redness, swelling, and tingling phenomenon.