Hi, This problem may be due to protective muscles happened on the muscles which supports knee joints especially TFL band locate on the outer portion of the thigh. During accident muscles will go or strong contraction to protect you from further injury , it is an involuntary protective mechanism controls by Brain. In this particular condition your other studies will be normal need to have more physical examination on basis of biomechanical view If you don?t release it might lead to chronic arthritis, back pain and pain around and under the feet. Meanwhile please check your shoe and find which side is worn off more. If it is inner side(big toe side) consider as abnormal weight transfer due to TFL tight. One more important thing there is no medicine to cure this problem need proper Physical therapy and exercise; you can also visit our web site and find out the available treatment for the same www.cmra.in