I've had a pair of La Sportiva Sportiva Trango S Evo GTX for a little over two years and love them, but in the last few months i've had a lump swell up above my ankle.
It is towards the top of the boot and flairs up mainly on descents and lasts for a few days.
It is a fluid filled swelling on only my right leg about the size of a fifty pence piece (and is very painful whilst walking).
My thinking is it must be me as the boots have no wear on the inside and are both identical, but i thought if there is a chance it could be the boot then it was worth asking if anyone else has had thee same issue or knows what it might be?
Also, are you wearing different socks from when it was OK? Also check the soles, it could be due to wear you are putting one of your feet down differently to the other