The whole body skin is dry and does not sweat, even if it is strenuous exercise, it hardly sweats. Sleeping at night will make you feel feverish and unable to sleep. What subject do you go to the hospital to see? I don't want to scare you. Have anhidrosis. However, congenital diseases are rare, and you immediately said that it was not like this before. You should go to the hospital for a checkup. Causing no sweat. None of them are minor illnesses. Diabetes, diabetes insipidus, chronic nephritis, mucinous edema and malignant tumor can all cause anhidrosis.