Namaste! You can use Kottakkal Nilibhringadi Keratailam oil in both ways you mentioned. It is safe to apply it after washing your hair and gently massage it, then wash it off the next day. Alternatively, you can apply it at least 30 minutes before washing your hair or even leave it overnight for better nourishment. The oil is designed to be versatile, so choose the method that fits your routine and comfort. Just ensure you wash it off properly to avoid any residue buildup. If you have a sensitive scalp or allergies, do a patch test first.

For any scalp issues or persistent concerns, consulting a dermatologist would be beneficial.