Your mother or grandmother will order you to not go out with wet hair. What is the reason for this? Are they right?
By the scientific findings go out with wet hair will lead you to headache to meningitis. If you think that you have dried your hair by a hair drier, you are completely wrong. Hair drier will not remove wetness of your hair follicles.
During few hours of taking a bath you hair follicles will open for absorb water. Then your immune system will make sick you by wind also.
You can get headache, cold as these wetness. Then they lead you to other complications. So you have to listen to your mother or grandmother. You should use a hat if it is cold season. If you use a hair drier to dry you have stay in a dry hot place for 1 hour.