Dandruff :
Dry itchy scalp resulting in flaky skin is known as dandruff. It might be caused due to physical factors as oily, irritated,dry scalp or due to yeast like fungus [malassezia] growth. Psoriasis and eczema are also known to produce dandruff. Use of harsh chemicals in the form of styling products, shampoos, sprays might also lead to dandruff.
It usually occurs in young males though it can occur in later stages in both the genders. Your dermatologist might prescribe shampoos and creams containing ketaconazole, selenium sulfide, coal tar, salicylic as components to name a few. Avoid using harsh chemicals, too hot showers and aggressively brushing your hair. reduce stress and maintain proper hygiene.