Back pain that lasts more than three months (chronic) is less common than acute pain. Back pain often develops without a specific cause that your doctor can identify with a test or imaging study. Muscle or ligament strain. Repeated heavy lifting or a sudden awkward movement may strain back muscles and spinal ligaments.
Visit your doctor.: Sinus pain can be very significant, significant enough to raise your blood pressure. You should visit your doctor to make sure that your headaches are really just from sinus pressure, and not from something more serious.
1 If you have high blood pressure, saline nasal spray may be use as an alternative.  If the sinus communication is on one side only, then please rest or sleep with the involved side tilted up. Example: If the communication is on your right side, then sleep with the left side of the face against the pillow.