A tennis arm is a condition of the adhesion muscle of the fore arm at the elbow. The adhesion is positioned at the outer upper side of the elbow. Mostly you can speak of an overload. In a small percentage the overload at the inner-lower side of the elbow, this is called a golf elbow. By the way, most people suffering from a golf or -tennis elbow, never played golf or tennis in their entire life.
You feel a painful spot at the outer side, at and around the bone of the elbow. This pain may radiate into the lower arm muscle. The pain increases when lifting, delivering strength by hand, stretching of the wrist while the elbow is strait. In the morning often stretching the elbow will be stiff and sensitive.
An effective method to fix this complaint is exercise therapy in combination with Trigger point therapy and the Guacha therapy. Guacha therapy is great to help making the Facia soft again so that muscle function will improve and the pain reduces. With a few correct stretch exercises a tennis arm can be treated well.
Most effective is to reduce the burden of lower arm and hand. Try avoiding lifting heavy objects, excessive turning of the lower arm, delivering strength by hand.