Apply Section By Section, Once Or Twice A Week Over The Whole Scalp. Massage And Leave In For 5 To 10 Minutes. Shampoo Twice. May Cause A Warm Sensation On The Scalp. Do Not Use On A Sensitive Scalp. Avoid Use For 2 Days Before And 2 Days After In-Salon Chemical Services. Not Recommended For Pregnant Or Nursing Women..