Cold arthralgia is a disease name. It is also called pain arthralgia and bone arthralgia. It refers to arthralgia with a strong cold evil. "Lingshu·Zeifeng" says: "Sometimes, it is hurt by dampness, which hides in the blood vessels and between the flesh, and stays for a long time without going away. If something falls with it, the bad blood will not go away. Suddenly, due to uncontrolled joy and anger, inappropriate diet, and unseasonable cold and heat, the pores are closed and blocked; when they open and encounter wind and cold, the blood and qi coagulate, and the old evil attacks, it will become cold arthralgia." "Lingshu·Shouyaogangrou" says: "Cold arthralgia is a disease that stays and does not go away, and it hurts from time to time and the skin is numb." "Zhengzhizhunsheng·Miscellaneous Diseases" says: "Cold arthralgia is caused by cramps and pain in the limbs and swollen joints."