How does this hair removal cream actually work?

Hair removal creams like this one work by breaking down the protein structure of the hair shaft at the skin's surface, so the hair essentially dissolves and wipes away rather than being pulled out at the root the way waxing does. That's why results last a few days to a week rather than weeks at a time. Since these creams can irritate sensitive skin, it's worth doing a small patch test first, and if you have a history of skin allergies, a quick check with your doctor or dermatologist beforehand doesn't hurt.