why do i gag when i brush my teeth

Gagging when brushing teeth happens because the toothbrush or toothpaste stimulates the sensitive gag reflex in the back of your throat or mouth. This reflex is a natural defense mechanism to prevent choking. Common causes include placing the toothbrush too far back, having a sensitive gag reflex, using a large toothbrush, strong toothpaste flavors, or anxiety and tension while brushing. Relaxation techniques, changing the brushing technique, using less toothpaste, and breathing through the nose can help reduce gagging during brushing.