The coldness in the arms is often caused by the following reasons: First, slow blood circulation, often due to poor physical quality, can be treated by increasing exercise, and can also find the Chinese medicine department oral Chinese medicine. Secondly, local thrombosis, especially arterial thrombosis, but the arm will usually be combined with obvious pain, which needs to go to the hospital to perform vascular ultrasound of the upper extremity for clarification, if the disease, the need for timely blood activation, thrombolysis and other related treatment to prevent thrombus blockage too serious resulting in ischemia and necrosis of the upper extremity. Third, if you only feel cold, but the body temperature is normal, often due to abnormal nerve conduction, you need to go to the hospital to check the relevant tests, such as electromyography, etc., usually need to adjust the diet structure, such as not eating too spicy food, appropriate intake of fruits rich in B vitamins and vitamin C, such as kiwi, apple, duck pear, etc., if necessary, you can also take oral vitamin-related preparations to solve the problem. In conclusion, if the coldness in the arms persists, it is necessary to go to the hospital promptly to clarify the cause.