As the pressure increases, the eardrum may break open (rupture). Damage to the eardrum can also occur from: 1  A very loud noise close to the ear, such as a gunshot. 2  A rapid change in ear pressure, which may occur when flying, scuba diving, or driving in the mountains.  Foreign objects in the ear.
Constant headache: Introduction. Constant headache: Constant headache is a steady and continual discomfort in the head. See detailed information below for a list of 9 causes of Constant headache, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Constant headache: Causes | Symptom Checker Â».
Introduction. Many different things can lead to a person having a headache, especially a dull one that is constant and chronic. A dull headache is not a migraine, but such headaches could develop into the migraines later. Potential Causes. One possible cause for such headaches is anemia. This is when the red blood cells are damaged or their count is low within the bloodstream.