Tennis Elbow - Tennis elbow, also referred to as lateral epicondylitis, is due to overusing the muscles in the forearm. This causes pain and tenderness within the outer A part of the elbow. It's typical amongst tennis players but can affect anyone who does repetitive arm actions. Golfer’s Elbow - https://www.theorthopaedicandpainpractice.com/why-is-my-elbow-swollen/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB