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».
True (primary) chronic daily headaches don't have an identifiable underlying cause. Conditions that may cause non-primary chronic daily headaches include: 1  Inflammation or other problems with the blood vessels in and around the brain, including stroke.2  Infections, such as meningitis.3  Intracranial pressure that's either too high or too low. 4  Brain tumor.5  Traumatic brain injury.onditions that may cause non-primary chronic daily headaches include: 1  Inflammation or other problems with the blood vessels in and around the brain, including stroke. 2  Infections, such as meningitis. 3  Intracranial pressure that's either too high or too low. 4  Brain tumor. 5  Traumatic brain injury.