After exercise to lose weight and fitness, the head and body sweat a lot. If you take a bath immediately, it may lead to an increase in blood flow to muscles and skin, and insufficient blood supply to other organs, especially if you can't take a cold bath, which is even more harmful.

After exercise, some people take a cold bath from head to toe in order to have a good time. At that time, they felt carefree, but afterwards they are likely to feel tired, and some even have headaches. This is because when the body sweats a lot, the capillaries are dilated. If you take a cold bath, the blood vessels contract sharply, and the heat in the body is inhibited by external forces, so it cannot be distributed for a while.

Moreover, intracranial arteries are rich in blood vessels and sensitive to external stimuli. In hot season, the head is particularly prone to sweating after exercise. At this time, if you wash your hair with cold water, it may cause abnormal intracranial vascular function, causing dizziness, headache, blackness at the moment and even vomiting. In severe cases, it may also cause intracranial hemorrhage.