The root cause i.e. direct cause of nasal boils is bacterial infection, often Staphylococcus aureus. Nasal boils may also be related to bad habits, decreased resistance, and disease factors. 1. Bad living habits: long-term use of hard toilet paper to wipe the nostrils, often digging the nostrils with the hands and other reasons lead to local skin damage, bacteria can easily take advantage of the infection and cause nasal boils. 2. Decrease in resistance: after staying up late, catching a cold or being nervous, endocrine imbalance and decrease in focal resistance of the nose will cause sensitive pathogenic bacteria to invade sebaceous glands and hair follicles in the nasal vestibule skin, thus causing nasal boils. 3. Disease factors: Diabetes, advanced tumor and other diseases cause systemic metabolic disorders, resulting in weak local resistance to bacterial growth, leading to the occurrence of nasal boils. It is recommended that the patient should consult the doctor in time, make a clear diagnosis under the doctor’s guidance, and carry out targeted treatment, and pay attention to developing good habits in daily life.