Abstract: This invention relates to an additive for a sanitary napkin and a method of adding the same, and is directed to a liquid mixture containing Borneo camphor, menthol, alum, sodium salicylate, camphor and aloe vera at a specific proportion. In use, a face layer disposed between absorbent layer and surface layer of the sanitary napkin is immersed in the mixture such that the mixture can completely and evenly penetrate into the face layer. The mixture is further sprayed onto the surface layer of the sanitary napkin. After drying, the face and surface layers are coupled with a bottom layer and a high polymer body to thereby obtain a sanitary napkin that can promote blood circulation, enhance absorption power of the sanitary napkin, prevent breeding of germs, and make the user feel dry and comfortable.