Can washing with hot water cause hair loss?
The simple answer to this question is no. Washing with hot water cleans your hair and scalp more effectively than cold water. It also strips away oil (sebum) from the hair, which can make the hair dry, dull and frizzy for some people. However, for many hair loss sufferers (especially men) it is a good idea to wash sebum oil from the scalp frequently because sebum contains DHT and DHT causes hair loss.
Men are more likely to have problematic levels of DHT than women because of the difference in hormonal balance between men and women. This is why an oily scalp is more likely to cause hair loss in men than in women.
What is the best water temperature for your hair?
For women luke warm is fine. For men with oily skin and hair loss, slightly hotter water is better. Not so hot that it’s uncomfortable but hot enough to wash sebum off the scalp.