about 40% of the population faces this problem of dandruff,if u notice dry flakes on ur scalp and hair,then u probably have dandruff too. causes-stress,anxiety,excess sweating,damp weather,humidity,improper diet,unhygenic conditions,fungal infections,indigestion and constipation,less water intake,etc. types- dry and oily from of dandruff. tips to prevent- first see the causes above given, then ..