Tennis Elbow - Tennis elbow, also called lateral epicondylitis, is attributable to overusing the muscles within the forearm. This causes pain and tenderness on the outer Component of the elbow. It is actually common among the tennis players but can have an impact on anyone who does repetitive arm actions. https://www.theorthopaedicandpainpractice.com/why-is-my-elbow-swollen/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB