There are several situations in which it is important to see a dentist. Regular dental check-ups and cleanings should be scheduled every six months to maintain good oral health and catch any issues early. You should also see a dentist if you experience tooth pain, sensitivity, or bleeding gums, as these may be signs of an underlying problem. Additionally, if you have a broken or chipped tooth, a loose or lost filling, or any other dental emergency, it is important to see a dentist as soon as possible. Lastly, if you are experiencing any changes or abnormalities in your mouth, such as lumps, bumps, or sores that do not heal, it is important to have them evaluated by a dentist.