Thick upper lip can be treated with orthodontic treatment if it is caused by convex teeth, or surgically if it is caused by over-thickening of the upper lip. Thick upper lip with overjet can be caused by dental problems, if the teeth grow too far outward, it can lead to overjet, which can be solved by orthodontic treatment such as wearing braces. If there are also problems with the maxilla, orthognathic surgery is needed to repair the maxilla. In addition, a thick, outwardly turned lip may be caused by an overly thick upper lip, which can be surgically thinned by removing the excess tissue. If you have a thick upper lip with severe ectropion, go to the hospital in time to get checked and choose the right treatment.