Not every two days, not every four days: how often should you wash your hair, according to a dermatologist?

Scalp hygiene is key to healthy-looking hair. Experts agree that the ideal frequency is usually between three and five washes per week, depending on hair type and lifestyle. Washing your hair regularly prevents buildup, unpleasant odors, and facilitates any subsequent hair treatments.

Dermatologist Alex Docampo denies that washing hair frequently increases oiliness: “Many people think that washing their hair a …