Why is my body uncomfortable when it is hot? Like a needle! Is it the blood?

You have dry skin. When you have a fever, sweat oozes from your pores like needles. Sweat is salty and slightly irritating to dry skin. It is a special case that the skin lacks moisture, and the problem is not big. This symptom usually appears in dry weather. You can use some cream water after bathing to keep your skin moist.