A build up of pressure within the skull and or around the ears is one cause of tinnitus. This pressure can be caused by trauma to the head, severe allergies or even migraines. Another possible cause of tinnitus is a change in blood pressure. The increase in blood pressure applies additional pressure onto the inner ear area and causes the ears to function incorrectly.When ringing ears and high blood pressure co-exist, the sufferer will usually hear either a whooshing or a thumping sound that corresponds to the rhythmic beat as their heart. With each heartbeat, blood is pumped or pushed through the veins and vessels located in and around the head and neck creating the sounds the tinnitus sufferer hears.

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