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».
A headache is considered primary when it is not caused by another medical condition or disease. Most primary headaches fall into three main types: tension-type, migraine, and cluster headaches. Tension-type headache is the most common type of primary headache. Headaches can be caused by problems in the interaction of chemicals in the brain, nerve pathways, and blood vessels.