Perms use harsh chemicals that can leave your hair smelling anything but pretty. According to the Hairfinder website, the odor "comes primarily from the ammonia in the ammonium thioglycolate (giving it that vaguely skunk-like smell)." No one likes to go around smelling like a skunk. If you are wondering how to remove the offensive odor from your hair, one smell-reducing method you can turn to is the tomato juice hair treatment.
Wet your hair with water over the sink. Once your hair is damp, apply tomato juice liberally. Tomatoes are acid based and help to combat the alkaline nature of the leftover perming chemicals in your hair that cause odor.
Massage the juice in evenly with your fingers so that it is distributed thoroughly from your scalp to the ends of your hair.
Bundle your hair in an old towel, and let your hair soak in the tomato juice for up to 30 minutes.
Shampoo with a strong-smelling fruity or flowery shampoo, and rinse your hair.