Cough Away Pain- It Works! Pain Coughing reduces the pain of a needle being inserted into the skin for a local anesthetic, an intravenous (IV) line or when blood is drawn.Reason: Coughing at the moment the needle is injected distracts a part of the brain that also perceives pain.Important: Before trying this approach, ask the practitioner to observe whether you move your arm when you cough. Want to Keep Reading? Continue reading with a Health Confidential membership. Sign up now Already have an account? Sign in