A hard lump in the nostril is not cancer. Clinically, hard lumps in nostrils are most commonly caused by sphenoid deviation caused by nasal septum deviation, S-shaped deviation or C-shaped deviation of the sphenoid, which is usually the result of nasal septum deviation when human fingers reach into the nasal cavity and touch the obvious bulge. However, septal deviation usually does not cause symptoms, but if the septum is heavily deviated, it can cause nasal congestion, runny nose, headache, loss of smell and other corresponding symptoms, so when there is a hard lump in the nostril, and there are obvious symptoms such as nasal congestion, runny nose and headache, further rhinoscopy and sinus CT examination should be performed at the hospital. If the diagnosis of deviated septum is confirmed, sinus endoscopic correction of deviated septum should be performed.