There are several reasons for the blistering of the corners of the mouth in children: first of all, it is caused by infection, if the child suffers from a viral or bacterial infection, the corners of the mouth will blister, especially after suffering from herpes virus, the probability of blistering the corners of the mouth is very high, and often there are fever, throat redness and swelling and other accompanying symptoms. At this time, you can give your child Chinese medicine to clear heat and detoxify the toxins, such as Pu Di Lan anti-inflammatory oral liquid or Blue Scutellaria oral liquid, etc., can be used. In addition, topical ganciclovir ointment can be used for antiviral treatment. The actual fact is that the blistering of the corners of the mouth will be repeated and last for a long time, and the child often has the habit of picky eating and partial eating.