Regardless, as the baby boomer generation demands a better life, techniques to deal with the 150000000 wearers of reading glasses expect more than bifocals. Science is working feverishly to help them. Headache is one of our most common health complaints. Fortunately, most headaches are annoying rather than serious. Rather than the common misconception that many headaches are caused by eyestrain, almost all headaches may considered to be due to tension, migraine or disease.
Tension headaches are the most frequent.
There is no simple explanation as to the mechanism. Pain may be experienced above the eyes, in the temples, almost anywhere on the scalp. Yet the location of the pain provides little help in localization of a cause. Tension headaches may result from temporary increases in the stress in everyday life. They may result from sleeping or working in a strange position, jaw clenching, grinding of teeth during sleep, or excessive gum chewing.