Cold back in middle-aged and elderly women may be caused by insufficient warmth, hypothyroidism and periarthritis of the shoulder. 1. Insufficient warmth: When the weather is wet and cold and the clothing is too little, the back may be cold. This is a physiological phenomenon and there is no need to worry too much. You can keep warm by adding more clothes or applying warm patches. 2. Hypothyroidism: If the recurrence of back coldness is accompanied by systemic symptoms, such as personality changes, pallor, and fatigue, it may be caused by hypothyroidism. 3. Periarthritis of the shoulder joint: when patients suffer from lumbar neck disease, due to overwork or inflammation resulting in poor blood circulation in local soft tissues, there will be a feeling of localized coldness. At this time, often accompanied by joint stiffness, pain and other problems. If the back is still cold even after timely warming, it is recommended that the patient consult a doctor in time to investigate the specific cause of the disease, and under the guidance of the doctor for treatment.