The causes of tight teeth headache are overwork, mental factors, tension headache and so on. 1. Excessive fatigue: after strenuous physical exercise, tight teeth can occur. In addition, excessive fatigue, excessive exercise can also appear headache, usually after sufficient rest will be improved. 2. Mental factors: If you suffer from depression, anxiety, neurosis, etc., it may affect your body’s senses, and you may also experience headaches, muscle pain, and the physical symptoms of tight teeth. 3. Tension headache: tightness of the head and neck muscles can lead to tightness of the teeth and headache. There are many other causes of tight teeth headache, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor to identify the cause of the disease and active treatment.