Overwashing Hair
There is really no good reason to wash your hair every single day, since our hair was not built to withstand harsh shampoos so often. These products tend to strip away hair’s natural oils that keep it healthy and shiny. Try doing some research about your hair type and how often you need to be washing it, and you can also do some trial and error to find the sweet spot for you.
Underwashing Hair
Of course, while overdoing it with washing your hair can cause damage, so can not washing your hair often enough. If you don’t clean your scalp enough, it can become a breeding ground for bacteria, which will then move into hair follicles. That could cause infections in extreme cases, so it’s best to avoid it altogether. It can also cause your hair to emit an unpleasant smell, which is undesirable.