Redness, swelling and pain inside the nostrils may be related to acute rhinitis, nasal vestibulitis, boils and other causes. It is necessary to target treatment according to the cause of the disease. 1. Acute rhinitis: acute inflammatory disease of the nasal mucosa caused by viral infection, may appear red and swollen nose, burning sensation inside the nose, pain and other symptoms. Need to use antiviral drugs, nasal irrigation and other symptomatic treatment. 2. Nasal vestibulitis: mostly caused by bad nose picking habits or nasal secretions stimulate the nasal vestibular skin inflammatory reaction, mostly bacterial infection, can appear in the nasal vestibule tenderness, skin redness, swelling, itching and other symptoms. You need to keep the area clean and use antibiotic ointment to treat the symptoms. 3. Boils: may be caused by plucking nasal hair, the nasal vestibule area is covered with skin, due to the above reasons lead to bacterial infection of hair follicles, which may cause localized swelling and pain, abscess formation. Need to actively anti-infection treatment, if necessary, sexual abscess drainage. It is recommended that the person with redness, swelling and pain inside the nostril go to the hospital in time, clarify the cause of the disease, and carry out standardized treatment under the guidance of the doctor.