Smallish hard lump/swelling up in nostril top right side of nose for over two weeks

Hi doctor I have a hard lump up in my right nostril on right side was bigger and painful two weeks ago now it seems to have gone down but still there its very hard smallish lump/swelling directly up my nostril top right side of nose. No nosebleeds. Please can you tell me what this could be thanks.

If it doesn’t subside in a week consult doctor. You may need nasal endoscopy for diagnosis.