There are two types of the condition that is known as tennis elbow with each causing pain in a different area of the elbow and forearm.
Lateral epicondylitis is the term used to describe what is commonly known as backhand tennis elbow.
This type of tennis elbow occurs when damage is done to the tedons which bend the wrist back away from the palm of the hand. This type of the condition will cause pain in the outer back side of the forearm. Medical epicondylitis which is better known as forehand tennis elbow is caused when damage has been done to the tendons that bend the wrist toward the palm of the hand causing pain on the palm side of the forearm from the elbow toward the wrist. This type of tennis elbow has also been called suit case elbow and baseball elbow. If you are a tennis player this condition will be evident during a backhand return.