No dental caries, but I have always had a toothache recently. What is the reason?

Incomplete toothache is caused by dental caries, and bacteria can enter the pulp through channels that are imperceptible to our naked eyes, causing pulpitis. For example, the acute pulpitis caused by the deformed central tip is very painful, but we can only find a small black spot on the occlusal surface of the tooth without obvious cavity. And this little black spot is where bacteria invade the pulp after the central tip of the deformity is broken. For another example, retrograde infection caused by cracked teeth and periodontitis can cause pulpitis, which in turn causes toothache.

When some people are overtired, or have a bad sleep, or have a cold and fever, or are in poor health, sometimes they suddenly feel a temporary pain in their teeth, but it disappears in an instant, but there is no disease in their teeth. This kind of toothache is actually caused by fatigue and poor physical condition. , thus affecting the teeth, causing pulp congestion, or nerve spasm, causing tooth pain. Transient toothache is more likely to occur if there are filled dental caries or diseased teeth with chronic inflammation in the mouth.