Common causes of white pustules under the nose include acne infection, boils and folliculitis. 1. Acne infection: mainly due to excessive sebum secretion, blocking the hair follicles, resulting in sebum can not be normally secreted out, so it is easy to be infected with Propionibacterium acnes, the formation of pustules red or with whiteheads herpes. 2. Folliculitis: caused by purulent inflammation at the mouth of the hair follicle, initially it is just a red pimple with obvious pain when pressed, and as it develops, pustules will form in the middle of the pimple. 3. boils: is due to the deep tissue of the hair follicle pus, infection, the formation of inflammation caused by the symptoms of the initial period and folliculitis is somewhat similar, but the inflammation will be deeper, the pus produced is relatively larger, when the inflammation spreads after the emergence of hard nodules, and then soften, the formation of pus plugs or pustules. Such a situation must not scratch and squeeze, but also pay attention to local hygiene, so as to avoid infection, when the situation is serious, it is best to go to the hospital, with the help of doctors to give the right treatment.