Toothache can be relieved after brushing is usually caused by the reduction of food impaction and microorganism attachment after brushing. 1. When there is a large amount of food embedded in the gap between the teeth, it may lead to toothache. After brushing, the embedded food is removed, which can reduce the stimulation to the teeth, and the symptoms of toothache can be relieved. 2. In addition, do not pay attention to oral hygiene, will make a lot of plaque, microorganisms attached to the surface of the teeth, inflammation, such as periodontitis, resulting in toothache, brushing can reduce the attachment of microorganisms, to remove the gingival sulcus or periodontal pockets in the food debris, so as to alleviate toothache. When the toothache is difficult to relieve should go to the hospital in time to check, first confirm the cause of the disease, and then targeted treatment, otherwise it is easy to delay the treatment time.