Weak spot of muscles round the joint, prior accidents to the joint and weighty guide occupational overuse are also a typical hazard factors. Grade 2: A partial tear into the MCL, with a lot more diffuse pain in the knee and some instability with the joint Surgical & Non-Surgical Excellence https://www.theorthopaedicandpainpractice.com/what-should-i-do-if-i-have-a-collateral-ligament-injury-of-the-knee/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB