Shoulder pain in the fifth month of pregnancy may be due to physiological reasons or pathological reasons, such as poor posture, frozen shoulder, cervical spondylosis, etc. 1. Physiological reasons: because after pregnancy, with the increase of the abdomen, the abdomen protrudes forward, the pressure on the shoulders, neck and back increases, and often incorrect posture, which causes the symptoms of shoulder and neck pain. 2. Pathologic causes: (1) Frozen shoulder: patients usually have a clear history of frozen shoulder. If the shoulder is cold or inactive for a long time, it is easy to cause the attack of frozen shoulder and shoulder pain. (2) Cervical spondylosis: Patients usually have a clear history of cervical spondylosis. If the cervical spine gets cold, it will easily lead to an attack of the disease, and will also lead to soreness in one or both shoulders. It may be accompanied by weakness of the upper limbs, and the patient may also experience pain and limited movement in the neck. In case of shoulder soreness in the fifth month of pregnancy, it is recommended to seek timely medical attention, follow the doctor’s instructions for further examination, and choose a reasonable treatment plan under the doctor’s comprehensive analysis.