One college student onRedditlearned this the hard way.
The harsh criticism left them feeling completely shattered.
Scroll down for the full story.
But that doesnt mean you better wash your hair every day, or even use shampoo every time.
Sebumplays a vital role in keeping both hair and skin healthy.
Overusing shampoo can strip away this protective layer, affecting the hairs overall health and resilience.
Experts note that only certain groups need to wash their hair daily.
But no matter how your hair feels, dont go longer than 14 days without washing, Lamb advises.
Some users even urged the student to report the teacher
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