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».
By Mayo Clinic Staff. Most people have headaches from time to time. But if you have a headache more days than not, you may be experiencing chronic daily headaches. The incessant nature of chronic daily headaches makes them among the most disabling headaches. Aggressive initial treatment and steady, long-term management may reduce pain and lead to fewer headaches. Symptoms.