In biology, poisons are substances that cause disturbances in organisms, usually by chemical reaction or other activity on the molecular scale, when an organism absorbs a sufficient quantity. The fields of medicine (particularly veterinary) and zoology often distinguish a poison from a toxin, and from a venom. Toxins are poisons produced by organisms in nature, and venoms are toxins injected by a bite or sting (this is exclusive to animals).
A problem with your jaw. Earache is occasionally caused by a problem with the joint of your jaw bone (where the jaw meets the skull). This is known as temporomandibular joint pain and can be caused by problems such as arthritis or teeth grinding.
Hives in adults can also be brought on by poor skin care. This can come in the form of dry or chapped skin, extreme sunlight, body tanning, extreme cold condition plus several others. The care of your body and the health of your skin play an enormous roll in what causes hives in adults.hat Causes Hives in Adults-The Immune System: What we do know is that hives in adults has a great deal to do with the immune system.