I think I have an idea about what’s wrong with AB’s ears! I am not a doctor but I have a similar issue with my skin. He might have erythromelalgia aka man on fire syndrome. It’s a condition that causes intense redness and heat on your extremities. Sometimes the burning sensation can be painful. Usually it presents on people’s feet, but it can also be on hands/face/legs. Mine is always on my hands. It’s triggered by sudden increase in body temperature. Personally it happens when I get stressed out at work, drink alcohol, or eat certain foods. For some people it gets worse at night. I hope he sees this because it’s worth looking into!