Comment on Lavender & Rosemary Homemade Hair Spray by D Pierre Van Zyl7th May 2018Collagen FAQ (Frequently Asked Questions) Share www.GetCollagen.co.zaI’m Sorry I meant can overdoing essential oils irritate scalp and cause hair loss? Reason I ask is cause I put a whole lot of diff essential oils and more then 30drops each and now my hair scalp is irritated… Source: Dr Axe