The triceps muscles are located in the back of the arm. They can cause pain while extending the elbow.

Golfer's elbow is also called medial epicondylitis or medial elbow tendinopathy. It is a common cause of pain at the inside of the elbow.

Tennis elbow is also called lateral epicondylitis or lateral elbow tendinopathy. It is a common cause of pain at the outside of the elbow.