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.
The lymph nodes are sensitive to changes in the body, most notably new tissues or particles that agitate the immune system. Listed below are some of the most common causes for swollen lymph nodes behind the left ear. Infections-Infections which enlarge the lymph nodes can be bacterial, viral or fungal.When the body suffers an infection, the cells start to produce antibodies to fight it off.ome specific types of infections that affect the nodes behind the left ear include: 1  Fungal Infection-Fungal infections in or around the head can cause the lymph nodes behind the ear to swell as the body works to remove the infectious elements.