I had a huge problem with heel pain last summer, and ended up being out for most of the summer. There are many different causes of heel pain, but most of them are due to not stretching enough. I had plantar fasciitis (sp?) and it was where the tendon on the bottrom of my foot (the one that goes from your heel to all of your toes), and it was so tight that it actualls so tight that it had partially ripped right at the base of my heel, which caused heel pain.
Another thing is a swollen growth plate. One of the girls on my team has that, but i think that it is actually due to the achilles tendon and the plantar fascia being too tight, and pulling it apart, making it appear swollen.
There is also seever's disease, which i'm not sure what that is, but it is also something some of my teammates have done.
Doin sole circles could explain it if the tendons are too tight, and flexing your foor when you do the sole circle would make it sore or rip if it was too tight.
I would suggest doing pike stretch and standing on the edge of something with your heels hanging off and pushing down.
Going to the doctor wouldn't be a bad idea, but i would wait a day or two to see if it gets better. Also, a podiatrist wouldn't be a bad idea.
Good luck!
