If you open your mouth and see white patches on the wall of the pharynx, the more common causes are pale mucous membrane of the back wall of the pharynx, fungal infection of the pharynx, tonsil stones, white spots in the throat, etc. The symptoms and treatment plans caused by different causes are somewhat different, so you need to clarify the causes and carry out targeted treatment. 1, pale mucous membrane of the back wall of the pharynx: some people have a pale mucous membrane of the back wall of the pharynx, which may have a certain color difference with the surrounding mucous membrane. The general discomfort, no special treatment, regular review can be; 2, pharyngeal fungal infection: pharyngeal fungal infection more common is Candida albicans, in the pharynx of the mucosal surface will form a layer of white pseudomembrane, can lead to open the mouth to see the pharyngeal wall with white patches, mainly due to the accumulation of mycelium, will cause pharyngeal pain, pharyngeal itching, coughing and coughing, breathing problems, fever and other discomfort, you can take Some patients need oral antifungal medication, such as fluconazole capsules, etc.; 3, tonsil stones: generally white or yellowish, in the tonsil crypt mouth, resulting in opening the mouth to see white plaques on the pharyngeal wall, may be accompanied by foreign body sensation in the throat, coughing, coughing, bad breath and other discomforts, it is recommended to gargle with light salt water to maintain oral hygiene. A small number of patients with tonsil stones are heavy, conservative treatment effect is not good, you can do tonsillectomy; 4, throat white patches: visible white patches on the surface of the throat, mostly related to smoking, alcohol and other factors, and can be accompanied by hoarseness, foreign body sensation, at this time, you should quit smoking and alcohol stimulation, avoid spicy food, for serious symptoms should perform surgery to remove the white patches.