The experience of treatment of 1011 patients with suppurative inflammatory diseases is described. In 292 of them the surgical intervention was found to be late. The analysis of errors has shown that it is not necessary to wait for the appearance of reliable symptoms of accumulation of pus. In the postoperative period 34 patients were not given proper drainage of purulent cavities. When prescribing corticosteroids, contraindications should be taken into consideration as well as hormonal characteristics of the patient and the sensitivity of his microbial flora of antibiotics.