Look for shampoos labeled "clarifying," "balancing," or "oil-control." These often contain ingredients like salicylic acid or sulfates to remove excess sebum. Consider a lightweight formula to prevent product buildup that can worsen oiliness.

Wash hair less frequently to avoid over-stimulation of oil glands. Use dry shampoo between washes to absorb excess oil and avoid touching hair unnecessarily, as this transfers oils from hands.

A clarifying shampoo with sulfates can effectively remove buildup and excess oil. Rotate it with a gentler, sulfate-free shampoo to avoid stripping the hair completely and causing rebound oil production.

Overactive sebaceous glands, genetics, hormones, or product buildup can cause rapid oil accumulation. Washing too frequently can also trigger increased oil production as the scalp tries to compensate for dryness.