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».
Permalink: http://www.medicaldictionaryonline.info/medical-term/Intractable+Headache. Offline Version: PDF. Term Definition: Common conditions characterized by persistent or recurrent headaches (see HEADACHE).