Acute gastritis is a severe inflammation of the stomach lining caused by an exogenous irritant. The disease is acute, but with a lack of treatment it becomes inveterate. Factors affecting the signs of pathology are the entry of chemicals into the stomach, an overdose of non-steroidal drugs, the use of food contaminated with microorganisms. When mummifying, scars form in place of tissue structures. If this pathology is not treated, stomach cancer gradually develops.