Neem's Herbal Spray. Available online, in many health food stores. Non-toxic, you can spray it on your dogs, which was why I got it in the first place. It keeps mosquitos, chiggars, ticks, etc at bay. It also stops the itching from them if you forget to spray it in the first place. For some reason, I attract ants, and I use it to run them the other direction. I have a bottle in my car, a couple in the house.
We were at a family reunion, and my cousin made the mistake of wandering thru the weeds. He was really chewed up with chiggar bites, and scratching himself silly. I told him try spraying this on his legs, and it stopped the itching. I know they also make a soap. I swear by it. AND....my dh cannot take anti-histamines, and he can use this.