The inability to open the mouth may be related to temporomandibular joint disorder, which can be relieved by massage, hot compresses and medication as follows. 1. Massage: with overall massage, patients press the temporomandibular joint with the palm of the hand, and then with opening and closing the mouth, repeated 40 times, which helps to restore the function of temporomandibular joint. 2. Hot compress: hot water bag filled with 2/3 of warm water (about 40~45℃), put it on the temporomandibular joint for about 20 minutes, which can effectively relieve the swelling and pain. 3. Medication: Oral non-steroidal anti-inflammatory drugs (such as ibuprofen extended-release capsules, diclofenac sodium extended-release tablets, etc.), or hormonal drugs can be taken to help patients with pain or anti-inflammation through local injections. If the symptoms worsen, it is recommended to seek timely medical treatment, and if necessary, surgical treatment.