Robert Timberg, author of John McCain: An American Odyssey , who has interviewed many POWs who served with McCain, said there's no evidence that he ever collaborated with the North Vietnamese. I've never known of any occasion in which Sen. McCain provided the North Vietnamese with anything of value, Timberg said.
What 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. Your immune system can be weakened by years of break outs or flare-ups due to disorders related to thyroid disease and even lupus.
A subset of chronic hives is known as physical urticaria. This means that a specific physical stimulus causes hives in certain people. Physical hives cause up to 16 percent of chronic hives. Types of physical hives include: Dermographism: Hives are produced suddenly by rubbing or stroking the skin. This type of physical hives is very common.