Dandruff, also known as scurf or Pityriasis simplex capillitii, affects the scalp and causes flakes of skin to appear - it is a common condition. It is the shedding of dead skin cells from the scalp. Some people have the wrong notion that it is because of bad hygiene or washing the hair often - this is a false belief. It is just that people having dandruff shed more skin then others.
However some dermatologists suggest that is caused by a yeast fungus that is believed to breed in a combination of sebaceous oil and dead skin cells.
Softly massage your scalp when you shampoo. This will help blood circulation and prevent skin from drying and cracking Use a mild shampoo only once or twice a week.