Pain in the lateral upper arm is mainly considered local muscle injury and chronic strain, then there is nerve root type cervical spondylosis, and even frozen shoulder can also cause pain in the lateral upper arm. In this case: First, you should brake and rest, do not move again, so as not to aggravate the injury. Secondly, local treatment should be carried out to activate blood circulation and remove blood stasis, anti-inflammatory and analgesic treatment, using the Chinese medicine Jinhuang Paste, or you can also apply the Western medicine Furtalin Emulsion, and if the symptoms are serious, you can also take non-steroidal anti-inflammatory and analgesic drugs such as diclofenac orally. Thirdly, physiotherapy such as local hot compress, gentle massage, acupuncture, moxibustion and spectrum irradiation can be used to relieve the symptoms. If it is caused by neurogenic cervical spondylosis, you can add B vitamins or methylcobalamin tablets to nourish the nerves, and you can also take oral medications to eliminate edema of nerve roots such as Mai Zhi Ling and Veritin. Generally, after rest, anti-inflammatory and analgesic treatment plus systemic treatment such as activating blood circulation and removing blood stasis, the symptoms can be seen to be relieved, and if the symptoms are not relieved, prompt medical consultation should be made.