Why Is My Hair Full of Dandruff?

The skin is constantly renewing itself causing dead cells to fall off as new cells from beneath them. This unnoticeable process normally takes approximately 28 days, but with Dandruff and Dermatitis it is much faster, occurring in up to seven days. The result is large visible flakes that appear as an overly dry scalp with itchy white flakes or as an oily scalp with greasy flakes. Be mindful that scratching only makes it worse and can cause more severe flaking as the skin tries to renew itself even quicker.