The lateral and medial epicondylitis is often manifested in a professional or in a sport context leading to repetitive wrist movements. The diagnosis is primarily clinical. Additional tests are indicated in chronic evolution and in searching for differential diagnoses. Elbow X-ray can be completed with ultrasound or MRI, the most efficient but expensive diagnostic procedure. There is no consensus on treatment. After a period of rest, stretching then strengthening exercises are recommended. Corticosteroid injections may provide a short-term beneficial effect. Platelet-Rich Plasma injections have recently gained notoriety. In case of failure of treatment, surgery is possible, but only in a minority of patients.