Hi Paul Harris 65, I had the same thing and my physio has diagnosed tenosynovitis. I also over pronate. I ran my first half marathon in April but ran it too quickly than what I trained for and kept jumping up on the pavements to overtake. The next day I had such a painful ankle and foot I could hardly walk. Anyway, after resting, trying to run, resting some more and trying again I went to the physio who diagnosed tenosynovitis which is inflammation of the tendon sheath. I get pain around my right ankle bone, down the side of my foot and under my foot and it also can spread up my calf and knee some days. After resting it seems fine but running seems to agravate it.
I had about a month of ultrasound from the physio and he also recommended calf stretches about 5 times a day and ice on the ankle 2 times a day. Not sure if the ultrasound really helped much as even though I stopped running on it whilst I was getting the treatment it seemed to feel worse. After 2 weeks off from ultrasound while I was on holiday my ankle started feeling a lot better. So with the physio's permission I have been able to do some slow 2 milers a couple of times a week to build up to running again. I still get twinges when I run and have recently moved up to 3 miles and the pain seems to be returning again.
I haven't been able to run properly since April and am feeling so frustrated. I really miss going for long weekend runs or a few 5 milers before a day of work. I'm not sure if I'm being over carefull as the pain is not excruciating as I'm bound to have some twinges after an injury or if I should try a different avenue of treatment (though not sure what?) If anyone else has any suggestions or Paul, if your physio recommends something else please do share. It's my ambition to run a marathon one day and I'm feeling pretty down not being able to train or not having my next race to aim for. Any suggestions would be useful.