Does washing your hair to much cause dandruff?

No, washing your hair too much does not cause dandruff. Dandruff is a common scalp condition that is caused by an overgrowth of a fungus called Malassezia. This fungus feeds on the oils that are produced by your scalp and can cause skin cells to shed more quickly than normal, leading to flaking and itching. Overly frequent shampooing may worsen the symptoms of dandruff temporarily by stripping the scalp of too many protective oils, but dandruff is not worsened in the long term. Therefore, washing your hair too frequently does not cause dandruff but may exaggerate symptoms.