I've been slowly building mileage while training for the WDW Marathon for most of the last year and have been injury free until just the last few days, when I have had pretty serious soreness and pain in the outside of my left knee. Doing some research it would appear I've got an IT Band issue. I've taken the last several days off and intend to basically hold back from running for a week, but I don't know what comes next. So frustrating to have had no issues for most of a year and for no apparent reason (other than the slowly building mileage) pretty intense pain appears. I ran a half marathon back in early October and felt great.
Some recommendations suggest a week off, some say a month. The marathon is in 6 weeks so I don't want to get too far off track from my program as I'm supposed to be approaching my longest runs over the next several week, but I'm not going to keep running on a painful knee and do more damage.
Today feels much better actually, but I'm going to wait a couple more days before headign back out.