Redness, swelling and pain on the inner wall of one side of the nose are commonly caused by nasal vestibulitis, acute rhinitis, nasal boils, etc. After the diagnosis is clear, it needs to be treated according to the cause, such as general treatment, medication or surgery. 1. Nasal vestibulitis: Nasal vestibulitis can lead to redness, swelling and pain in the inner wall of one side of the nose, accompanied by nasal congestion and increased secretion. Antibiotic medications such as erythromycin ointment and gentamycin ointment can be used for treatment, while avoiding undesirable behaviors such as picking the nose with the hands. 2. Acute rhinitis: acute rhinitis attacks can also lead to the phenomenon of redness and pain on one side of the inner wall of the nose, you can use physiological sea saline to rinse the nasal cavity, clear bacterial infection can be oral antibiotics, such as roxithromycin, amoxicillin and so on. 3. Nasal boils: a sore and swollen nose may belong to a nasal boil, which needs to be incised and drained to discharge the pus, and then with antibiotic drugs, such as erythromycin gel, while avoiding squeezing the boils with your hands. There are many reasons for the swelling and pain on the inner wall of the nose, and it is recommended to go to the hospital to complete the examination and take standardized medication and treatment according to the doctor’s instructions, so that you can’t ignore the symptoms and take them lightly.