What Is Tennis Elbow?

Tennis elbow (lateral epicondylitis) is a painful injury caused by overuse and repetitive muscle strain.

By HourlyTraining

Published September 22, 2020.

Tennis elbow (lateral epicondylitis) is a painful injury caused by overuse and repetitive muscle strain. Repeated contraction of the forearm muscles used to straighten the wrist may cause stress to the tissue, resulting in tiny tears in the tendons that attach the forearm muscles to the bony bump on the outside of the elbow.

Tennis elbow typically causes pain at the bony prominence on the outside of the elbow, but the pain may often spread into the forearm and wrist.

Tennis elbow is commonly caused by sports such as tennis and squash, but may also be caused by a number of other common and repetitive arm motions, such as:

  • Repetitive use of a computer mouse
  • Playing of certain instruments, such as the violin
  • Various throwing sports
  • Weightlifting
  • Activities involving fine, repetitive wrist movements, such as painting or sewing