Mouth ulcers are the most common symptoms, and appear in the form of small painful white spots in the mouth, and to avoid such ulcers should pay attention to oral hygiene and teeth, and does not require the use of medical preparations or mouthwash concentrated or disinfectant.

The German Chamber of Pharmacists in Lower Saxony advises to wash the mouth with water after meals, as delicate injuries, which may result from breadcrumbs, nuts and chocolate or irritations caused by eating tomatoes, citrus fruits and spices, may be responsible for the appearance of infections and mouth ulcers.

It is not yet clear what causes ulcers to develop in the oral mucosa and pharynx accurately, and mouth ulcers often appear with histamine-containing foods such as smoked foods, highly ripe fruit cheeses and various types of nuts.