Red Ear Syndrome has been the bane of my existence for almost 60 years. I believe the source was exposure to frigid weather when I was a youngster without earmuffs or other protection. I grew up outside of Boston. It was not uncommon to return home with hands (and ears) so cold that placing my hands under running cold water would feel as if they were in steaming hot water. My ears were colder yet. I suspect some sort of tissue damage occurred (need more evidence). It used to be that both ears would get hot simultaneously. That symptom went away thirty years ago. I almost never have it now. It is just the right ear.
Temporary relief is obtained by holding one's head under a cold water faucet and permitting the water to cover the ear, or by placing a cold item such as a cold, wet cloth or an ice cube against the offending ear.
Solution: I have found that the ear can be returned to normal until the next episode by cooling the ear to 65 or 70 degrees. This is most easily done by climbing into a car and driving with the A/C on full blast and the vents pointing directly at the hot ear or ears. This will provide immediate relief of the uncomfortable sensation due to the syndrome. Better yet, if the A/C is in proper working order, the vent air should be about 45 degrees F. Maybe as low as 38 degrees. Cool off that ear for 15 or 20 minutes (getting the ear very cold). The syndrome will have stopped and the annoyance will have disappeared until the next episode.
It used to be that anything that physically touched my ears would set them off or for no apparent reason. Now, I find that a warm room or environment or physically exerting myself for more than a half hour can bring onset. I haven't experimented with touching my ears. That used to set them off.
Lastly, I am still catching the hot ear symptoms about once a week. Over the years, I have had spans of 6 to 10 months with virtually no incidents. Then they return. I hope this will be helpful.