12 Signs You May Have an Orofacial Myofunctional Disorder — and What a Comprehensive Evaluation Can Reveal Learn the common signs of orofacial myofunctional disorder, including mouth breathing, tongue thrust, poor lip closure, and swallowing difficulties. Speech-language pathologists can assess oral muscle function and recommend suitable exercises to improve breathing habits, speech, and everyday oral coordination. https://breatheworks.com/signs-of-orofacial-myofunctional-disorder/