What Causes Excessive Dandruff?

Excessive dandruff is commonly caused by inadequate scalp cleansing, irregular sleep patterns, seborrheic dermatitis of the scalp, pityriasis capitis (scalp tinea versicolor), or psoriasis. If associated discomfort occurs, it is advisable to seek timely evaluation and treatment at a reputable hospital. Below is a detailed analysis:

1. Inadequate Scalp Cleansing

Accumulation of scalp oils and dust, along with impaired natural shedding of old keratinocytes, leads to the formation of fine, flaky dandruff. Regular scalp cleansing using mild shampoos and gentle massage helps prevent oil buildup.

2. Irregular Sleep Patterns

Chronic sleep deprivation and excessive fatigue disrupt normal scalp metabolism, accelerating keratinocyte turnover and resulting in increased dandruff. Maintaining regular sleep-wake cycles and ensuring adequate rest supports healthy scalp metabolism.

3. Seborrheic Dermatitis of the Scalp

Overactive sebaceous glands create an environment conducive to microbial proliferation, triggering mild inflammation that causes abnormal keratinocyte shedding—producing abundant greasy dandruff. Under medical guidance, selenium sulfide shampoo, ketoconazole shampoo, or coal tar shampoo may be used to cleanse the scalp and maintain dryness.

4. Pityriasis Capitis

Dysbiosis of the scalp microbiome accelerates keratinocyte turnover, leading to large amounts of dry, white scales accompanied by mild pruritus. Under medical supervision, oral vitamin B6 tablets, compound vitamin B tablets, or itraconazole capsules may be prescribed; spicy and oily foods should be minimized in daily diet.

5. Psoriasis

Abnormally rapid epidermal cell proliferation results in excessive thickening and shedding of the stratum corneum, forming thick, bulky scales. Topical treatments—including calcipotriol solution, mometasone furoate cream, or tacrolimus ointment—may be prescribed under medical guidance; for refractory lesions, narrow-band ultraviolet (UVB) phototherapy targeting the scalp may be considered.

In daily life, maintaining regular sleep habits and a light diet, practicing proper scalp hygiene, avoiding frequent perming or dyeing, and promptly seeking medical evaluation for persistent scaling or pruritus are essential for effective management and targeted treatment.