For me it is plantar fasciitis. For the past 6-7 years I have had to deal with an almost chronic, low-grade case of it in one foot or the other. I can manage the problem but I can't seem to get rid of it. I have had cortisone shots, I do exercises, I stretch, I tape the offending foot and take ibuprofen while I'm hiking: It all helps but I have yet to find a cure.