Our products have not been tested on sensitive scalps though they are gentle and have not caused cases of inflammation or irritation on our test clients. We are also formulated with clean, high-quality ingredients to limit the possibility of reaction. As with any product, we recommend performing a 24 hours patch test on a small part of your scalp and integrating any new products slowly to gauge if you are allergic or averse to the formulas. If an allergic reaction is experienced, please see your doctor immediately and also reach out to us directly at contact@floraebeauty.com to report the occurrence.