Incidence of the epicondylitis humeri lateralis in a sample of 48 patients was analyzed according to age groups. The highest incidence was found in the age group of 21-30 that corresponds to the etiologic factor of more intensive work with extended arm and clenched hand, practiced by tennis players, bricklayers, house painters, etc. The incidence in soldiers was insignificant. Patients were treated conservatively. There were no severe cases requiring operative treatment. Success was achieved by deep subtendinous and subperiostal infiltration of corticosteroids with 0.5 or 1% Novocain around the affected area. Infiltration was performed in 7-day intervals and the best result was achieved after the second one.