A nasal boil is a limited acute purulent inflammation of the nasal vestibule or tip of the nose, usually caused by Staphylococcus aureus. Nasal boils are usually caused by trauma or infection of the nasal vestibule resulting in skin damage and secondary infection, most commonly due to nose picking. If allergic rhinitis with a lot of nasal mucus or sinusitis with repeated pus and repeated irritation, nasal boils also tend to form; for some organisms with weak resistance and systemic diseases, the prevalence of nasal boils is very high. If a nasal boil occurs in the triangle and is not treated properly, it may lead to intracranial infection and other complications such as cavernous sinus thrombophlebitis. Weak patients are advised to use some vitamin-rich foods in their daily life and to take active physical exercise, because patients with weakness and diabetes are prone to nasal boils and recurrent attacks. So in daily life it is recommended that you must not pick your nose and do nasal rinsing frequently. You can often put some oily ointment on it. Actively treat nasal diseases with frequent runny nose.