Causes and nature of headaches.

2. Bruxism. Often the headache is accompanied by bruxism - the tension of the masticatory muscles. Constantly (more often at night) clenched jaws cause tension in all the muscles of the neck and upper thoracic region, which also leads to a decrease in blood flow to the head. A “vicious circle” mechanism is formed: emotional stress leads to repetitive muscle tension, as a result, the muscles go into chronic spasm, signaling the brain about their tension.