If you feel that your back is tight and sore, there are usually several factors that lead to this: the first major category, diseases of the surgical system, so surgical diseases are often caused by frozen shoulder, cervical spondylosis, neck and shoulder muscle joint pain and ligament and tendon strains and injuries, all of which can lead to back soreness and pain clinical symptoms. If the amount of exercise is too much or the way of exercise is incorrect, and the upper limbs are strained and not relaxed in time after exercise, it will also lead to back tightness, accompanied by clinical symptoms and performance of muscle soreness. The second major category, common diseases of the internal system, such as common diseases of the circulatory system acute coronary syndrome, unstable angina pectoris, myocardial ischemia, myocarditis and other conditions. Such as common diseases of the respiratory system can have lung infection, large pneumothorax, pleural effusion can also appear as painful tightness in the back. If there are common rheumatism, breast disease also will appear the above clinical symptoms.