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.
Statistics: According to this same survey, headaches were the “most commonly reported individual recent illness condition”; in addition the survey also states that “persons aged 25-44 years were more likely to report headaches than persons in other age groups”. Treatment: Using over-the counter pain medicines, prescription drugs, if having chronic or bad pain, avoiding things that trigger headache. Some major research work was going on.