The disease of dorsal strain is a component of lumbar and back muscle strain, which, together with lumbar strain, constitutes the total response of human trunk myofasciitis. The human body takes the spine as the axis, and the back and waist are the longer segments of the human axis, supporting the whole process of dynamic activities of the body. The back muscles, which are located in the upper part of the trunk, have a special physiological position, connecting the head and neck to the waist and legs, and the back muscles are involved in both dynamic and static activities of the trunk, carrying different degrees of mechanical load. Therefore, myofasciitis of the back is a common and frequent clinical condition. The clinical manifestations of back muscle strain can vary greatly depending on the site of damage, the type of tendon and the severity of the strain, in addition to the symptoms of localized soreness, pain and functional abnormalities of the strained tendon, which are common to occult myofascial injuries. The factors that can easily cause clinical confusion are: ① produce traction conduction symptoms, such as cardio-thoracic syndrome, where the symptoms are manifested in the anterior thoracic thorax, and the dorsal muscle strain forms a hidden source of pathogenesis. (ii) Although the hidden pain symptoms are in the back, it is difficult to confirm them by projection examination with high-tech advanced examination tools such as X-ray, CT, MRI, etc. (③) The back myofascial structure is intricate and complex, so it is not easy to locate and confirm the diagnosis by general cursory physical examination. Back thoracic myofascial strain occurs in the rhomboid region of the back, i.e. the top of the rhomboid is bounded by the posterior spinous process of the seventh cervical vertebra, the lower sides are bounded by the inner edge of the scapula, and the bottom corner of the rhomboid is bounded by the posterior spinous process of the twelfth thoracic vertebra. The area is densely covered with muscular and fascial tissues of the rhomboid, rhomboid, and erector spinae muscles, respectively. In addition, there are also upper and lower posterior serratus muscles distributed on the bone surface. The examination should be based on a full understanding of the physiological composition of the dorsal region, through the positive and negative comparison method. It is important to identify the exact location of the transversal fascia foci and to provide confirmation of the treatment conditions. Common dorsal muscle strain occurs in the following order: ① Oblique muscle fibers in the lower thoracic region of the trapezius muscle (i.e., fibers between the spinous process of the twelve thoracic vertebrae and the scapula), with lesions on the left side being particularly common. (ii) The thoracic-iliac rib muscles and myofascia near the inner edge of the left scapula. ③The large and small rhomboid muscles. ④thoracic segmental spines and longest thoracic muscle. Dorsalis muscle lesions: closely related to the original tissue structure at the site of the resulting lesion, which can form polymorphic manifestations such as granular, cord-like, and block-like. Palpation characteristics of the lesion: ① abnormal sensation when the lesion is touched by the physician and the patient produces synchronous perception. ②The sensitive and paralytic periods of the disease produce different responses in the same patient, and during the paralytic period, the patient is unresponsive; during the sensitive period, the patient is particularly sensitive. Patients are particularly sensitive. After the paralysis period, the sensitivity tends to increase, which can be regarded as one of the indications of improvement.