First of all, my answer is: Yes. Because, I am in the south, you know, it is very hot in the south now. After class at noon, I went back to my dormitory, covered in sweat and sweaty on my head. But, after all, I have to take a nap to keep my energy. Do you still want to wash your hair? Why don't you have a good rest after washing your hair and blowing it? Shampooing or not shampooing actually affects the comfort of rest most. You rest at noon, but after all, you have to sleep for a long time at night. If your hair is oily, you should wash it. After all, oily hair is almost greasy, and it is particularly uncomfortable after sweating. If it's dry, just wait until the sweat is dry and go to bed without washing. After all, the genes of dry hair are good. Even if you don't wash your hair for a few days, no one will think you haven't washed it for a few days. If you have oily hair, you wash your hair in the morning and people will ask you if you haven't washed your hair for a few days in the afternoon. ...

To sum up, you don't have to wash it, but washing it will improve your comfort and sleep quality, especially for oily hair. But you can do it without washing. The most important thing is to make sure that your hair is dry before going to bed. As long as it's dry, it's fine.