A sore throat and back pain may be caused by chronic pharyngitis, lung infection, coronary heart disease, or malignant tumors of the larynx. 1.. Chronic pharyngitis: if you suffer from chronic pharyngitis, due to the repeated irritation of the inflammation on the mucous membrane of the pharynx, the symptom of sore throat will appear, and patients with chronic pharyngitis usually have frequent irritating coughs, which therefore leads to back muscle soreness and swelling, and therefore the symptom of back pain. 2. Lung infection: Upper respiratory tract infections such as poorly controlled, can cause the infection to spread downward, causing lung infections pneumonia, will show symptoms of sore throat back pain. 3. Coronary heart disease: due to acute ischemia of the heart muscle, causing angina pectoris, myocardial infarction attack, resulting in pain along the nerve conduction to the pharynx and the back, resulting in symptoms of sore throat and back pain. 4. Malignant tumor of the throat: if there is a malignant tumor in the throat area, due to the repeated stimulation of the throat area by the tumor, the symptom of sore throat will appear. With the development of the disease, the tumor may be transferred to the back, which will stimulate the nerves of the back, and thus the symptom of back pain will appear. If you have a sore throat and back pain, it is recommended that you go to a regular hospital to complete the relevant examinations, clarify the specific causes, and follow the doctor’s instructions to adopt the appropriate treatment plan to avoid delaying the condition.