Thank you for your message!

Haven't done any work on my IT band, as Im not sure what to do for it (I looked up some stretches, but they didn't feel very effectoive when I tried them).

In answer to your questions-
Yes the pain came on immediately after a particular run (although I wasn't aware of anything particular that could have caused it)

The pain is a kind of deep ache and can be very intense

No problems with my back

And yes the poain only occurs with running- no problems with walking, going up or down stairs, cycling etc. However, if I have aggrevated it by going running, the walking immediately after is painful. (Hopping and jumping jacks are pain free).

I have avoided running and been doing cycling instead as this is pain free, as well as stretching and pilates.

Thank you again for your message