Temporomandibular joint dysfunction (TMJD) indicated alterations in the muscle, temporomandibular joint (TMJ) and other tissues that lead to discomfort and jaw pain. One of the adverse consequences of oncologic treatment that is commonly experienced by individuals suffering from head and neck cancer (HNC) is trismus, which is characterized by a restricted 35 mm of mouth opening or less. Trismus has been reported to occur as often as 40% of the time. The range of prevalence is 5% to 46%. Mandibular function (chewing and eating) and quality of life (QoL) are negatively impacted by trismus. Speech, dental care, oral hygiene, nutrition, clearing the airways, and oncological follow-up can all be negatively impacted. Study objective: This investigation was conducted to look into the impact of Therabite (TB) exercises on trismus and temporomandibular joint dysfunction (TMJD) following oral oncologic treatment