Tennis Elbow is a condition that affects the tendons and muscles around the elbow joint. This condition is similar to Golfer's Elbow, but it specifically affects the outside of the elbow; whereas, Golfer's Elbow affects the inner elbow. Tennis Elbow is closely related to tennis and other activities that involve repeated motions with the forearm and elbow. Tennis Elbow is one of many conditions that is considered a repetitive stress/strain injury since it takes repeated forceful movements of the hand, wrist, and elbow to cause this condition. People with Tennis Elbow typically experience pain in the outer part of their elbow and in the forearm tendons. Tennis Elbow will cause people to experience pain, loss of hand strength, and numbness in the hands and neck.