Clients sometimes experiences hives immediately after a waxing. They can be small itchy bumps right where hairs were or larger welts that look like mosquito bites. The hives only last a short time. An hour at most. Typically, hives on the area that was waxed first, are already fading by the time the waxing service is completed. This is a histamine reaction. The body is reacting to the hairs being pulled out. The body is perceiving the hair removal as a threat. The immune system springs into action producing histamine to fight the threat, like an allergic reaction. Does this mean my client was allergic to the wax? No. The body is reacting to the irritation of the hair being pulled out not the wax itself, producing inflammation and hives as a defense mechanism.