Going Outside with Wet Hair Makes You Sick or Catch a Cold

Colds are caused by viral infections, not by wet hair or cold exposure. While exposure to cold can marginally increase susceptibility to some respiratory infections in extreme conditions, the relationship is weak and indirect. Wet hair itself has no effect on viral transmission. This myth persists across cultures and generations despite overwhelming medical evidence to the contrary. It's likely rooted in the temporal coincidence of getting wet and later catching cold.