Inclusion Criteria:  age between 18 and 50 years acute ( not more than two weeks) closed complete injury injury of Achilles tendon in zone 2 (the area between 3 and 6 cm from the insertion) according to Langergran and Lindholm  Exclusion Criteria:  incomplete injury recurrent injury associated fracture ankle or foot previous history of local corticosteroids injection patients with neurovascular problem (e.g. diabetic, autoimmune …etc), smoking, and alcoholics