Blood thickening is not a medical term that refers to high blood viscosity, and there is no direct link between blood thickening and sweating. High blood viscosity is mainly due to the increase of formed components in the blood, such as the deformation and accumulation of red blood cells, or due to the increase of lipid content in the blood, in addition, high blood pressure can also lead to increased blood viscosity. In addition, high blood pressure can also lead to increased blood viscosity. Sweating is mainly water, not formed components of the blood, so high blood viscosity is not related to sweating. It is recommended to go to the hospital to find out the cause of high blood viscosity and to treat the cause of the problem. In daily life, we should try to take a light diet with low salt and low fat, eat more fresh vegetables and fruits, exercise properly, and ensure enough sleep to promote the recovery of blood vessel elasticity and lipid metabolism.