If you have a sensitive or reactive scalp, caution is advised when introducing any product containing botanical extracts. While these herbs are traditionally used in hair and scalp products, individual sensitivity to specific plant compounds or the preservatives in the formula can vary. A sensible first step is to perform a patch test: apply a small amount of the mask to a discreet area of skin on your arm or behind your ear, leave it on for the recommended time, and rinse. Monitor the area for 24 hours for any signs of redness, itching, or discomfort. If no reaction occurs, you might try applying the mask carefully to the lengths of your hair, avoiding direct scalp contact during your first few uses. The important note from the product description applies: if you notice any irritation on your scalp or skin, stop use immediately.