Here in rural Mexico, our big problem is scorpions. I have taught a few people to use McCormick's meat tenderizer. (The active ingredient is Papaina.) I carry it with me whenever I leave the house.
One as instantly as possible makes a paste of the salt-looking tenderizer, and rubs it on the bite, more or less continuously for ten minutes. So far everyone who has done that has found total and complete cure. The other choice is rushing to the hospital for anti-venom.
I taught this to my English student kids. And, gave both families their own bottle of tenderizer. One girl, a few days later, her aunt got stung, and she rushed and put the stuff on just as I described. Next trip down town the aunt also bought her own bottle of tenderizer.
A cousin got stung on his back, but only put it on twice. He ended up getting all floppy a couple hours later, and had to go to the hospital. Continuously for ten minutes.
By the way, the antivenom costs over $100 USD per dose, and they may need two doses.
I sometimes get woke up in the middle of the night to drive a kid to the hospital. By the time they get to my house the poison is in their blood and it is too late for tenderizer.
it does also work for bee stings. And, yes, those are ant bites you have. I get them here from time to time. those teeny, tiny ants produce great lumps just like that. I don't know if tenderizer would work or not.
if you get massive chigger bites, the answer if Listerine. Wet a cloth, really wet, and hold it in one place for five or ten seconds, then repeat until you cover the entire area of bites.
Tenderizer also works on jelly fish stings, but get at it quick.