Hi Dear, Welcome to HCM. Understanding your concern. As per your query you have symptoms of swelling in the nostril which seems to be due to staphylococcus bacteria infection which are the common organism to cause bump inside the nose. However, many other bacteria present inside the nose and the mucus membrane can also cause bumps. Most of the time, bumps in the nose heal within few days if they are small fermentation with warm water on the outer side of the nostril two to three times in a day will help the bump to ripe and recede fast. If the size of the bump (boil) increases in size even after taking antibiotics and home remedies, your doctor may advise surgical incision and drainage. Applying juice of onion to the bump in the nostril will hasten it to ripe and drain few days early. Visit ENT specialist once and get complete examination done and start treatment accordingly. Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari