Tension-type headaches may be caused by muscle tension around the head and neck. Chronic contraction of the temporalis muscle caused by the teeth clenching is one of the main cause. Treatment: Using over-the counter pain medicines, prescription drugs, if having chronic or bad pain, avoiding things that trigger headache
Statistics: Globally, it has been estimated that prevalence among adults of current headache disorder is 47%. Half to three quarters of the adults aged 18–65 years in the world have had headache in the last year and among those individuals, more than 10% have reported migraine. Headache on 15 or more days every month affects 1.7–4% of the world’s adult population.