M.W.
It is an old home remedy, but it might help you. We used to wipe fresh mosquito bites with aromatic spirits of ammonia to relieve the inflammation. My father used to say that it neutralized the part of the mosquito saliva that was irritating. I don't know if that is the case, but I do know that it worked, if you got to the bites fairly quickly. I don't know if that treatment has anything to do with it, but as I reached adulthood, I stopped getting the itchy welts after a mosquito bite, now they are only a little red spot that does not itch. I hope this helps, good luck finding the aromatic spirits of ammonia.