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.
Ceruminosis refers to the excessive build-up of wax in the ear canal. Symptoms include itching in the ear, sharp pain behind ear and muffled hearing. Excessive ear wax builds up if the ear canal is to narrow, if the ear glands produce too much ear wax or if the ear wax is pushed in while using ear buds.