Can this mustard powder be used as part of a routine for an oily scalp?

Mustard powder is a traditional ingredient in some home recipes for hair and scalp care, particularly for those interested in natural routines for managing oiliness. The idea is based on mustard's properties: when mixed into a paste and applied to the scalp, its warming, stimulating effect is thought to help cleanse and invigorate. It is important to understand this is not a cosmetic treatment for a medical condition. It is a strong plant material. Its use can cause significant burning, redness, or irritation, especially on sensitive skin. If you choose to explore this traditional use, start with a very small amount in your paste, do a patch test first, and leave it on for a very short time (e.g., 3-5 minutes) before rinsing thoroughly with cool water. Monitor your scalp's reaction closely. It is not intended to diagnose, treat, or prevent any disease, and consultation with a dermatologist is advised for persistent scalp concerns.