Dandruff is a common scalp disorder affecting almost half of the population at the post-pubertal age and of any gender and ethnicity. It often causes itching. The severity of dandruff may fluctuate with season as it often worsens in winter. Most cases of dandruff can be easily treated with specialized shampoos. Those affected by dandruff find that it can cause social or self-esteem problems, indicating treatment for both psychological and physiological reasons.