Usually 3~7 days after the filling is not painful, if accompanied by persistent pain symptoms, you need to seek medical attention in a timely manner. Dental filling is a common treatment in dentistry, which is an invasive operation that causes hot and cold stimulation to the tooth when removing decayed material, so patients will experience pain and swelling after filling. Usually, the pain and swelling after filling will be relieved or disappeared in about 3~7 days, but due to the different pain sensitivity and physical condition of individuals, there are individual differences in the time of pain disappearance. For the pain phenomenon, can be relieved by ice packs, the pain is serious can be prescribed to take ibuprofen, acetaminophen and other non-steroidal anti-inflammatory drugs treatment. If the filling is still accompanied by pain, swelling, or even bleeding, local lymph node swelling, pus, etc., you should be alert to the pulp inflammation caused by infection, which is an abnormal phenomenon. It is recommended that people with persistent pain after filling should consult a doctor in time so as to clarify the cause of the disease and follow the doctor’s instructions. Enhance oral care and avoid cold, spicy and irritating foods.