I have chronic pain in my heel. It's been with me for 20 years. Usually it subsides for a while and I get on with exercise. But this year it isn't going away. I'm okay with not playing soccer or basketball any more. Rowing is going well. But my foot is getting in the way of hiking and even walking!
There are 26 bones in a foot. And heel pain is common. This article in Medical News Today is pretty informative.
Rest. Ice. Ibuprofen. I guess that's what I'll keep doing.... Sigh.