Dandruff is a skin condition that mainly affects the scalp.it is nothing but excessive scaling of dead cells of skin of scalp. our body undergoes constant change and renewal in every 24 hour. Same way our scalp skin has numerous cells, when the shredding of dead cells in scalp become excessive, they are visible in the form of flakiness and scales which we call dandruff.
Other cause for increased production of sebum and excessive shredding are:
Excessive use of chemicals such as sprays, hair gels, hair coloring agents. also less shampooing and infrequent rising could be the cause.
Salty or hard water in some locality is also found to be the reason behind dandruff
Dandruff is nothing but symptom which is presented in form of
White flakes over scalp and hair with excessive itching. But if in case dandruff is presenting with silvery flakes or red skin beneath or other symptoms persists, than you should Definitely consult your doctor, it could be sign of other Diseases of Scalp like