Trismus, commonly known as lock jaw, is a medical condition characterized by restricted mouth opening due to spasm or contraction of the jaw muscles. It commonly occurs in patients undergoing cancer treatment, especially head and neck cancer, but can also result from dental surgery, infections, and other causes. Key Facts Trismus refers to the limited ability to open one’s mouth due to muscle spasm, pain, or mechanical restriction It’s often colloquially referred to as lockjaw Trismus can arise from a variety of issues, including dental procedures, trauma, infections, and certain medical conditions Management and treatment depend on the underlying cause but often involve physical therapy, pain management, and addressing the…