There are many causes of pain in the back of the armpit, including muscle injury, muscle fasciitis, herniated disc, peripheral nerve lesions, rib lesions, etc. Other rare diseases, such as pleural lesions, lung lesions and heart lesions, as well as stomach and pancreatic lesions may also cause pulling pain, which can only be clarified by further examination. The most common clinical condition is muscle-nerve lesions. In this case, we should first pay attention to rest, avoid straining, pay attention to cold and warmth, and consider local physiotherapy, massage, acupuncture, etc. to relieve pain symptoms. In addition, the topical application of Furtalin ointment and topical creams can also have certain effects. In case of significant pain, lidocaine and hydrocortisone can also be used to close the painful spot in the most obvious area, and the oral non-steroidal anti-inflammatory drugs loxoprofen sodium and celecoxib are also effective. In the case of peripheral neuropathy, the cause should be found first. For example, patients with diabetes and nephropathy are likely to have this condition, and treatment of the primary disease can be considered, along with the application of nerve-nourishing drugs, such as methylcobalamin, vitamin B1, rat nerve growth factor, coenzyme Q10, as well as blood activation and improvement of microcirculation, such as Chuanxiongzine hydrochloride and low-molecular dextran. In case of heart disease, it may be angina pectoris, which requires prompt oral administration of nitroglycerin or quick-acting heart pills, and simultaneous application of vasodilators, and in severe cases, stent placement. In the case of pancreatitis, sensitive antibacterial drugs and octreotide or growth inhibitors should be applied.