Myofascial trigger points are tender points within tense bands of muscle. Normal muscle does not contain these tense bands. Once activated, these trigger points may cause muscle weakness, restricted range of motion, as well as local or referred pain. Hypersensitive trigger points can develop following trauma, longer-term unresolved pain, overload in a muscle, overuse due to poor postures or repetitive active loading, or when the body is in a stressed and tense state.