Final answer:
To relieve trismus, the patient can apply heat, do gentle jaw exercises, and take pain relievers.
Step-by-step explanation:
To relieve trismus, also known as lockjaw, the patient can try several methods. Applying heat or hot packs to the affected area can help relax the muscles and reduce inflammation. Gentle jaw exercises and stretches can also help improve jaw mobility. Additionally, taking over-the-counter pain relievers such as ibuprofen can help reduce pain and swelling.