Pus inside the nostril is first considered to be a boil caused by bacterial infection, and it is recommended to go to the hospital in time for targeted treatment. Staphylococcus aureus and other bacterial infections are common pathogens. If the patient has the bad habit of plucking nose hairs or digging the nose, the nasal vestibule area can cause folliculitis, and the inflammation expands to the periphery, forming a hard nodule, accompanied by redness, swelling, heat and pain, and then the center softens and fluctuates after a few days, and the top of it appears yellowish white punctate pus plugs, forming a boil. Self-expression is not recommended in this case to avoid retrograde intracranial infection. Drainage of the abscess can be considered, and actively cooperate with anti-infection treatment. If there is pus inside the nostril, it is recommended to go to a regular hospital in time to get a clear diagnosis, and standardized treatment should be carried out under the guidance of the doctor.