Chiggers in Florida from April to Sept in low lying wet areas and pine needles. I just spray DEET everyday before walking the farm on my sox, boots, and pant legs to the knee briefly. If I forget, I use calamine lotion as soon as possible. It can stop it before it starts if early enough.
Let a new bottle of Calamine sit awhile, then pour off half the water, shake and use it thick and pasty, all around the bite area. Re-apply often, and it will clear up in a couple days vs. a week or more without. Do not scratch, apply more calamine.
Nail polish will irritate, school glue takes longer to dry, but why? just cake on the calamine! Dollar Tree has it for $1.00; it works best!
If you are bound to use the old redneck remedy, I prefer the pretty red rose color nail polish. Then calamine over it after drying; it will prevent scarring.