Lip plumpers induce a stinging or burning sensation due to specific ingredients designed to increase blood flow to the lips. This reaction is a direct consequence of vasoactive compounds irritating the delicate skin, causing a temporary swelling and reddening that creates the illusion of fuller lips. For example, ingredients like capsaicin (derived from chili peppers), menthol, or nicotinic acid esters trigger sensory nerve responses, leading to the perceived heat.
The effectiveness of lip-enhancing products relies on this irritant reaction. The increased blood flow not only contributes to a plumper appearance but also enhances the natural lip color. Historically, methods to enhance lip volume were less sophisticated, often involving abrasive techniques. Modern formulations provide a less invasive, albeit temporary, method to achieve a similar effect.
