If you have foot pain that is at its worst when you first start using the foot after a period of inactivity (or first thing in the morning), and that abates as you use the foot, it's almost certainly fasciitis.
It's important to treat it as it can become chronic if left untreated.
(I'm rolling a frozen golf ball around as I write this. I'm using a SpongeBob golf ball, but I don't think that's a necessity.)