The headache suddenly started when she was an elementary school student and was acute pain like temples were pressed. The headache lasted for 10-20 minutes but stopped if rested. The headache became more frequent and intensive when she was a junior high school student and it disturbed her school life. When she became a high school student, she needed pain medication every time she had the headache. The cause of the headache was discovered at a dentist where she had a part-time job.
The cause was Temporomandibular Joint Disorder (TMD), which causes pain in the muscles that move the jaw or restricted movement of the jaw such as the difficulty of opening the mouth wide. It is thought to be caused by arthritis, clenching or grinding the teeth or stress, but the exact cause is difficult to determine. Females between 20 and 40 are affected more.
In her case, it is thought that malocclusion of the teeth put a burden on the muscles from the jaw to the head, which was connected to the trigeminal nerves, resulting in the intensive headache.
TMJ disorder can lead to pain and numbness in the shoulder, hands and feet or the whole body, or sometimes causes depression if proper treatment is not provided.