High blood pressure levels. Are you in the RED? How about when your pain spikes? New studies have showed that blood pressure spikes and/or high blood pressure is becoming a common test to determine pain as it is one of the body's reactions to pain symptoms. Chronic Pain Patients should keep an eye on their BP.
A comic that isn't recognized all that often is Blue Ear he's a man with a hearing aid and he actually was created because a boy refused to wear his hearing aids so his mother tried to contact marvel because his reason for not wearing them was 'no super hero wore hearing aids' so his mother tried and tried to get the boy to put them on by talking about Hawkeye but that didn't help. So marvel worked with another company to create blue ear.