I had major IT problems 3 years ago & ended up with surgery b/c I didn't rest it enough. I tore it off the bone & split it in half. I'm going to recommend that you buy the best cushion shoes you can afford, decrease your mileage significantly & ice, ice, ice on the days that you do run. Anti inflammatories are helpful if you tolerate Aleve or Motrin.
I didn't take my symptoms seriously. I should have & now I have titanium screws in my leg as a result of my "this can't be happening & if it is, I'll gut it out" way of thinking. I train completely differently that I used to.