The filling in the morning and pain in the afternoon, may be the filling material stimulation, carious tooth tissue is not cleaned up, dental nerve exposure and so on. 1. filling material stimulation: filling materials have a certain degree of irritation, after filling the teeth in the afternoon pain, may be caused by filling material stimulation, generally in 2 ~ 3 days after the pain symptoms will gradually disappear. 2. Decayed tooth tissue is not removed cleanly: there are remnants of decayed tooth tissue is not removed cleanly, the tooth will also appear after the filling pain, need to remove the decayed tissue and fillings, re-filling. 3. Nerve exposure: the caries is deeper, has invaded the nerve, not timely root canal treatment, the tooth will also appear after the filling pain. After filling the tooth pain, it is best to go to the hospital in a timely manner, to clarify the cause of the disease and then symptomatic treatment.