Dandruff is not a disease it’s a symptom
and can be healed
we are not born with it, we gain it over time by using the wrong hair products(shampoo & conditioner) are full of silicones ( dimithicone) fake perfumes with alcohol , and other fake ingredients that our body rejects and try to warn us as a natural reaction ,producing oils to is a result of the dry scalp caused by the chemicals and silicones in those products
how to fix it
change your products and read the ingredient list (YUKA app)use hair cleansers with only natural ingredients and aroma and stay away from the main stream shampoo.