If you get a pimple on your mouth, you must not squeeze it because pimples are inflammatory skin diseases caused by bacterial or fungal infections. In the process of squeezing the pimple, the pressure may lead to further fungal or bacterial infections, aggravating the inflammation and inducing local inflammatory problems such as redness, swelling, heat and pain. Also refuse to scratch, must avoid hot water, can consider topical application of fusidic acid, erythromycin, clindamycin or peroxybenzoyl for anti-infection treatment. Also pay attention to avoid spicy food as well as seafood, beef and mutton to avoid aggravating the inflammation.