What is the problem of sweating when it is slightly hot and feeling very cold when it is slightly cold?

This is a sign of yang deficiency. Qi can be divided into defending qi and nourishing qi. Wei qi is a layer of gas that protects the periphery of the body and has the function of fixing sweat and preventing cold. It is in charge of the contraction and opening of sweat pores, and people who guard against qi deficiency are prone to spontaneous sweating, that is, they will sweat a lot if they exercise less or the weather is not hot. Supplementing qi means nourishing qi and has the function of nourishing the body. Weak Qi Ying can cause chills and tepid hands and feet. You can take "Shiquan Dabu Pill" and you will get better soon.