Dandruff is a common scalp condition that results in the shedding of dead skin cells, which can appear as white or yellowish flakes in the hair. While it is generally not harmful, dandruff can be an embarrassing and irritating issue. It is often accompanied by scalp itching and may affect your confidence.The most noticeable symptom of dandruff is the presence of white or yellowish flakes in the hair or on clothing.