Most of the feeling of tooth swelling after filling is a normal physiological phenomenon, but there may also be complications such as secondary infection. 1. Normal physiological phenomenon: after filling the teeth due to filling material stimulation, coupled with filling operation may stimulate the local nerve, which leads to fillings feel teeth swelling. You should pay attention to oral hygiene, avoid eating too hard and acidic food. 2. Secondary caries: under normal circumstances, this symptom will gradually reduce and disappear, if the symptoms persist or gradually aggravated, should consider whether there is secondary caries and other conditions. If the tooth feels swollen after filling, if it is a normal recovery process does not need special treatment, if there is secondary infection, you need to take medication under the guidance of the doctor.