For the massage therapist:
Be sure to assess all muscles of inhalation as well as any other muscles which attach to the thoracic cage or thoracic spine. While all muscles are important to assess and treat if needed, specific muscles which should not be overlooked are; the sternocleidomastoids, scalenes, obliques, rectus abdominis, internal and external intercostals, pectoral major and minor, diaphragm, serratus anterior, latissimus dorsi, and trapezius. Muscles on the posterior of the body must be addressed even though symptoms may only present themselves at the costosternal joints because of the pressure these muscles exert on the thoracic cage. You may experience difficulty in palpating and releasing deeper muscles until the more superficial muscles are released. According to the Mayo Clinic other treatments for costochondritis include muscle relaxers, NSAIDS, antidepressants, physical therapy, and heat.