Nasal vestibulitis and a nasal furuncle can cause a bump inside the nose, according to Merck Manuals. Paranasal sinus and nasal cavity cancer is another possible cause of a bump inside the nose, states the National Cancer Institute.
Nasal vestibulitis is a minor infection in the base of a nasal hair follicle caused by Staphylococcus bacteria, explains Merck Manuals. Application of bacitracin ointment or mupirocin ointment over several weeks cures this condition.
A nasal furuncle is a more serious infection in the nose that forms a boil, notes Merck Manuals. Patients with nasal furuncles must apply moist, hot compresses to the area and take a course of oral antibiotics. In some cases, doctors must surgically drain nasal furuncles.
Paranasal sinus and nasal cavity cancer is a malignancy that can be treated with surgery, radiation and/or chemotherapy, explains Cancer.Net. It is often curable if discovered early.