Another effect of sleep deprivation that I have felt is that when sleep deprived, the body's tollerance for alcohol, (and probably other drugs), is much lowered, so a small amount of alcohol will have more effect on you when you're very tired.
Mastoiditis can cause pain behind the ear and down the neck. MedlinePlus states that mastoiditis is an infection of the mastoid bone of the skull, which is located directly behind the pinna or the outside portion of the ear.hoto Credit Jupiterimages/Photos.com/Getty Images. Numerous conditions can cause pain behind the ear and down the neck. According to MedlinePlus, a publication of the National Institutes of Health, neck pain can travel to other parts of the body, such as the shoulder, arm and head.
This can block the Eustachian Tube. As a result air cannot reach the middle ear, so the pressure there decreases. When the pressure is lower in the middle ear than in the ear canal, it causes the eardrum to bulge inward. The bulging of the ear-drum can cause pain and as a result, one may experience tinnitus symptoms. So yes, I think that sinus infection can very much cause Tinnitus.