Herniation in the periosternal tissue usually accompanies a clinical picture reminiscent of an acute inflammatory process: sharp pain in the sternum and (or) epigastrium; possible increase in body temperature. The diagnosis is made based on the results of physical and x-ray examinations. The choice of surgical treatment for Larrey's hernia is determined by the size and location of the parietal fascia defect and the size of the hernial protrusion. To reduce the incidence of complications, the goal of conservative treatment is to preserve the hernia until it closes spontaneously. Rational employment of the patient is of certain importance.