Physical therapists (PTs) are experts in movement and function, which sounds like a pretty broad topic to be an expert in, and it is. After physical therapists graduate PT school (now-a-days at the doctoral level), they find their niche and specialize. You can find PTs working with high-level athletes, children, infants, people who are recovering from injuries, people with neurological conditions and many other types of clients.
For internal massage, your PT may insert a finger into the vagina or rectum and massage the muscles and connective tissue directly. A frequently used technique is “Thiele stripping,” in which your therapist finds a trigger point by feeling a twitch in the muscle underneath, exercising it using a circular motion, and then putting pressure on it to help relax it, repeating the process until the muscle starts to release. Internal massage can also help release nerves. Sometimes, anesthetics can be injected into these trigger points. PTs may do this in a few states, but in most states, a doctor or nurse must administer injections.
^ Bernard, Stéphanie; Ouellet, Marie-Pier; Moffet, Hélène; Roy, Jean-Sébastien; Dumoulin, Chantale (April 2016). "Effects of radiation therapy on the structure and function of the pelvic floor muscles of patients with cancer in the pelvic area: a systematic review". Journal of Cancer Survivorship. 10 (2): 351–362. doi:10.1007/s11764-015-0481-8. hdl:1866/16374. ISSN 1932-2259. PMID 26314412. S2CID 13563337.
Myofascial release was developed by John Barnes to evaluate and treat the myo-fascia throughout the body. The myofascial system is the connective tissue that coats our muscles, nerves, blood vessels, and bones, and runs throughout our bodies. Any tightness or dysfunction in the myofascial system can affect the aforementioned structures and result in pain and or movement dysfunction. By treating the fascia directly, therapists can improve their patient’s range of motion, reduce pain, and improve a patient’s structure and movement patterns.