Consider rhomboid strain, rotator cuff injury, myofasciitis, coronary artery disease and so on.
1. Rhomboid muscle strain: If a posture is too long for a long time, it can cause rhomboid muscle strain and pain in the middle of the left side of the back, which can be alleviated by resting.
2. Rotator cuff injury: Injury to the infraspinatus muscle causes pain in the middle of the left side of the back, mostly accompanied by limited shoulder joint movement.
3. Myofasciitis: Chronic strain injury causes non-specific inflammation, exudation and adhesion of the back muscles, which will usually be accompanied by localized pain, stiffness and limitation of activities.
4. Coronary heart disease: when angina occurs, it can radiate to the back pain, which can be accompanied by chest pain, chest tightness, breath holding and other symptoms.
There are more causes of pain in the middle part of the left side of the back, and if it persists without relief, it is recommended to go to the hospital in time to avoid delaying the condition.