The causes of red spots on the palate of the mouth include the following: 1, pharyngitis: the mucous membrane of the soft palate and throat is congested, capillaries dilate, resulting in submucosal oozing of blood and producing erythema. 2, oral erythema: when the body’s immunity decreases and suffers from oral erythema, granular red spots can be produced on the mucous membrane of the lips, cheeks, palate, etc., and sometimes erosion and ulceration occur. 3, allergic stomatitis: when taking drugs or allergenic food and When allergic stomatitis occurs, capillary fluidity rises rapidly in the lips, cheeks and soft palate, exuding more fluid and forming edematous erythema or blisters. 4. polymorphous exudative erythema: the mucous membrane of the lips, cheeks, tongue and palate is congested and edematous, and erythema appears on the surface, etc.