If you have taken a shower right before bed or you were outside walking in the rain, allowing yourself to get drenched.
You will want to think twice before going right to bed without using the hairdryer to dry your hair before bed. Why? Because there are seven illnesses that you can catch if you do go to bed with wet hair.
Having wet hair becomes a breeding ground for bacterial infections brewing which will result in scalp and skin infections, and this will be very bad for your overall health. The last thing you will want are infections that can easily be developed this way. Towels and pillowcases become breeding grounds for bacteria because they trap body oils and dead skin cells, and with the added moisture in the picture – it allows the bacteria to thrive.