A frontal protrusion lisp typically resolves on its own with time and a little practice, but a lateral omission lisp requires intervention. The good news is that speech therapy can correct both types. A frontal lisp is a speech disorder where the tongue is in the front of the mouth instead of the normal place behind the teeth. The tongue can be in the wrong place for breathing and speaking, and can cause problems with pronunciation and fluency. Treatment for a frontal lisp usually includes speech therapy to help the person learn how to properly use their tongue and speak properly. Sometimes surgery is needed to correct the lisp.