For radiation-induced trismus (limited jaw opening) and fibrosis, a combination of Pentoxifylline and Vitamin E is often prescribed to help reduce scar tissue and improve blood flow. Daily jaw-stretching exercises using tongue depressors or specialized devices (like TheraBite) are also essential to restore mobility. For your stomatitis, soothing alcohol-free mouthwashes (like salt and baking soda rinses), topical anesthetic gels (such as Lidocaine), or mucosal protectants can relieve pain and promote healing. Please consult your oncologist or a specialized physical therapist to safely prescribe these medications and guide your jaw rehabilitation exercises.