Back pain at the joint between the root of the arm and the back can be caused by myofasciitis of the back of the shoulder, frozen shoulder, osteoarthritis of the shoulder joint and so on.
1. Myofasciitis of the back of the shoulder: prolonged over-activity, exertion, or prolonged exposure to wet and cold environments can lead to strain injury of the local tissues, triggering myofasciitis of the back of the shoulder and causing pain and discomfort at the joint between the root of the arm and the back.
2. Frozen shoulder: Frozen shoulder can cause adhesion and stiffness around the shoulder joint, which can lead to symptoms such as pain around the shoulder joint and limitation of activities.
3. Osteoarthritis of the shoulder joint: Osteoarthritis of the shoulder joint is often triggered by cold, exertion and other triggers, which may cause soreness, swelling and pain in the joints, and may radiate to the root of the arm and the back, resulting in pain.
If you have pain in the back, you should consult a doctor in time and take appropriate treatment under the guidance of a specialist to help relieve the discomfort as soon as possible.