A 9-year-old boy in China went to a dental clinic because he had chipped a front tooth. He left with an explanation for the stuffy nose that allergy treatment had failed to fix: an extra tooth growing upside down, with its crown pushed through the bone of his palate toward his nasal cavity.
The case, published April 7, 2026, in the peer-reviewed journal Frontiers in Medicine, describes a boy who had spent about a month with a blocked right nostril and a dull ache in his nose. An ear, nose, and throat specialist had diagnosed allergic rhinitis and prescribed a steroid nasal spray, mometasone furoate. His symptoms improved only partly.
