I've had pain in my left foot ever since I ran this morning. It came on just short of 6k - I was aiming for 6.5 and managed to keep going till I got there although was a bit slower. It wasn't sudden as in happened in one step but I ran the first 5k no problem (well apart from being soaking wet...). I got in the car, and the minutes took weight off the foot I felt it go away. I was actually quite surprised when I got home and stepped out of the car and it was REALLY sore. It's only really sore to put weight on, pressing on it's fine. Deep heat and massaging it don't seem to help (so far). It's just in front of my heel, on the sole of my foot but more on the outer aspect - the instep is fine. No sure what it is? Plantar fasciitis seems to be more on the instep from what I can see on here - and would it be completely fine for 5k and then really sore? Don't know what else it could be though. Any suggestions?