I had several bites from fire ants and ran them under hot water from the bath, which seemed to trigger (or accelerate) a full-body reaction (anaphylaxis?) and a harrowing trip to the emergency room!
It's hard to tell people to do things that reduce their blood flow, because it comes with complex side effects; but definitively not do anything that increases your blood flow. (As in, if you are feeling sick, do not eat peppers either.)
https://pmc.ncbi.nlm.nih.gov/articles/PMC10309056/ supports this.
But when you have more than a few bites, you probably will not want to do that. Even more if you feel them a lot, and if you are not used to have lots of mosquito bites on you.