Oily scalps may need washing every 1–2 days; dry/flaky scalps may worsen with daily washing
Hair texture
Straight/fine hair shows oil faster (may need 2–4x/week); curly/coily hair is drier by nature (often 1x/week or less)
Ethnicity & hair structure
Tightly coiled hair (common in Black individuals) has difficulty transporting sebum down the strand—washing less frequently (weekly/biweekly) is medically appropriate, not neglectful
Lifestyle
Sweat-heavy exercise, humid climates, or product buildup may require more frequent cleansing
Scalp conditions
Seborrheic dermatitis, psoriasis, or folliculitis may require medicated washing (prescribed by dermatologist)
