Ugh, chiggers. Hate them. Have to spray myself down with bug spray during the "growing seasons". Yuck. My best luck has been to use a serious amount of bug spray (OFF, etc). If I am going to be out a while and won't die of heat stroke, long pants tucked into my socks with a heavy layer of bug spray over both works well. LOL.
Can't wait for a few good freezes to kill those booogers off! I find chiggerX to work the best too.....for any kinds of bites. Take oral Benadryl and dab that on.......OR those bite pens. They work good too.