Women with left shoulder pain need to be alert to diseases such as frozen shoulder inflammation, rheumatoid arthritis, cardiovascular and cerebral vascular diseases, and liver diseases. Patients should go to regular hospitals for examination as early as possible, and after clarifying the cause of the disease, carry out regular treatment. 1. Frozen shoulder: middle-aged and old women are prone to attacks, which not only causes pain in the left shoulder, but also may affect the normal activities of the shoulder joint. 2. Rheumatoid arthritis: it will not only cause shoulder pain, but also likely to lead to functional limitation of the left shoulder. 3. Cardiovascular and cerebrovascular diseases: myocardial ischemia, myocardial infarction and other diseases may cause left shoulder pain. 4. Liver disease: the main symptom of acute hepatitis is right upper abdominal pain, which may also cause left shoulder pain. Women’s left shoulder pain may also have other reasons, it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease, to give targeted treatment or treatment.