Why my knee gets locked? Whenever I try to bend it I cannot straight it out, I have this injury since 19th april 2019 my mri report (on may 18) says "grade 1 acl sprain, linear hyperintense signal is noted and posterior horn of medial meniscus extending upto the free edge of the meniscus posteriorly with associated small paramedical cyst measuring approx 6�4 mm of grade 3 tear. Grade 1 horizontal signal in anterior horn of medial meniscus. Minimal joint effusion noted. Small bural effusion in the medial head of the gastrocnemius and the semimembranous bursa. I have taken physiotherapy management: that includes ultrasonic therapy and shortwave diathermy for 20 days and since june 5th to july 2nd! and continuing only knee strengthening exercise since then! do I continue physiotherapy which I discontinued since july 2nd? Please advice.