Cold showers do not cause hair loss. In fact, cold water can actually stimulate testosterone which supports hair growth. However, this is only really in men. Men aren’t the only people who have testosterone in their bodies, but they do tend to have more than others.
So, if you are hoping to get a slightly fuller head of hair, a cold shower might be the answer. Cold showers also have a range of other benefits and can wake you up, help ease anxiety, and increase circulation. But, it’s best to still wash your hair and body with warm water. The best compromise is to wash your hair and body with warm water, then finish off with a cold blast of water.