Inclusion Criteria:  Patients of age >21 years old History of chronic pain on the lateral side of the elbow and pain on lateral epicondyle on direct palpation and resisted dorsiflexion of the wrist for more than 3 months Ability of patients to provide informed consent  Exclusion Criteria:  Previous tennis elbow surgery to affected elbow Previous corticosteroid injections to affected elbow Concurrent complementary and alternative medicine (CAM) treatments e.g. acupuncture Inflammatory diseases / infection / fracture / trauma Neck pain on ipsilateral side Chronic pain syndromes Malignancies Pregnant or lactating females Consistent use of NSAIDs within 48 hours of procedure Systemic use of corticosteroids within 2 weeks History of anemia, any blood disorders, hypothyroidism