Soreness in the muscles around the neck is mainly considered as lactic acid accumulation, muscle strain and cervical spondylosis. 1. Lactic acid accumulation: Excessive shoulder and neck exercises, such as chest expansion exercises, playing tennis, etc., can cause lactic acid to be produced in large quantities, thus accumulating in the shoulder and neck muscles, causing muscle soreness. 2. Muscle strain: Exercise too vigorously or improper activities can strain the muscles around the neck and cause aseptic inflammatory reaction, resulting in muscle pain. 3. Cervical spondylosis: when patients with cervical spondylosis stimulate the nerves in the neck, it can lead to muscle spasm, muscle stiffness, muscle pain and other symptoms, which are clinically manifested as muscle pain around the neck. Muscle pain around the neck may also have other pathological factors, such as cervical bone tumors and cervical vertebrae fracture, etc. It is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.