Children licking lips with a circle of red is mostly caused by the bad habit of licking lips regularly, lack of vitamins and so on. It can be treated by eliminating the bad habit of licking lips and eating more fruits rich in vitamin C and vitamin B, such as kiwi and apple. 1. Bad habit of regular lip licking: some children will regularly lick their lips, which may lead to saliva long-term stimulation of the skin around the mouth and produce a circle of red, so there is a bad habit of regular lip licking, parents should stop in time. 2. Lack of vitamins: children licking lips a circle of red may be caused by a lack of vitamins, eat more vitamin C, vitamin B-rich fruits, such as apples, pears, kiwi and so on can effectively alleviate the symptoms. If the condition is serious children, please go to the local hospital in time for examination, clear cause and treatment.