Society mistakenly believes that just the fact that many people have headaches makes them normal. Many people have that occasional headache but the frequency of how many people have them regularly may surprise you. At least one time per month about 15% of the population experience a headache, but there are some estimates and say that there are 5% or more have a headache every single day. This type of headache can be that only constant, but also debilitating at times. And headaches are one of the most common causes of disability with Americans. They are one of the top reasons for visiting the doctor and more than 250 million days are lost from work because of this disabling headache that cost over $25 billion per year. Headaches affect the entire population, but women are twice as likely to get them as men. Read more