Article in English: A strained muscle occurs when individual muscle fibers are taken beyond their limits and tear, which leads to pain, inflammation and some degree of guarding (muscle spasm in attempts to prevent further damage). A deep tissue massage is helpful for mild-to-moderate strains because it reduces muscle spasm, combats inflammation and promotes relaxation. Start with a 30 minute massage, focusing on your shoulder, lower neck and mid back areas. Allow the therapist to go as deep as you can tolerate without wincing.  Always drink lots of water immediately following a massage in order to flush out inflammatory by-products and lactic acid from your body. Failure to do so might cause a headache or mild nausea. Your therapist may do trigger point therapy that focuses on areas of tight muscle fibers that can form in your shoulder after injuries or overuse. Acupuncture is an ancient art and involves sticking very thin needles into specific energy points within the skin / muscle in efforts to reduce pain and inflammation. Acupuncture for shoulder pain (caused by an injury or arthritis) can be effective, especially if it's done when the symptoms first occur. Based on the principles of traditional Chinese medicine, acupuncture works by releasing a variety of substances including endorphins and serotonin, which act to reduce pain.  Acupuncture is practiced by a variety of health professionals including some physicians, chiropractors, naturopaths, physical therapists and massage therapists — whoever you choose should be certified by NCCAOM. Acupuncture points that may provide relief to your shoulder pain are not all located near where you feel the pain — some can be in distant areas of the body. Chiropractors are joint specialists who focus on establishing normal motion and function of the spine and peripheral joints such as the shoulder. Shoulder pain is not only caused by the underlying glenohumeral and acromioclavicular joints, but also from joint issues in the neck and mid back. Your chiropractor is trained to diagnose joint...

Summary in Chinese:
按摩肩膀。 考虑进行针灸。 咨询脊椎按摩师。