There will be a slight pain after the application of the corns patch, if severe pain is not normal. First of all, from the analysis of the principle of action of the rosacea paste, the internal salicylic acid contains a high concentration of acid, through the corrosive effect of the corneal layer corrosion stripped, when the dermis will be exposed, all the sensory endings are in the dermis, so the rosacea paste will have a slight pain sensation after the paste. If the pain is severe, it means that the corneal cream has been applied for too long, which not only peels off the stratum corneum, but also damages the dermis of the skin. The pain is more obvious when the dermis is damaged, there will be redness and inflammation, at this time to immediately remove the rosacea paste, in the local application of erythromycin ointment, iodophor, mupirocin to reduce the local inflammatory reaction, the pain disappears. After applying the drug, the surface necrotic keratin layer can not be forcibly peeled off, mature after the natural shedding can be.