I had maybe 6-8 mosquito bites on my feet and ankles it was so itchy it was becoming unbareable so I got normal cooking salt rubbed it in for about 1 mins on my slightly wet feet in the tub and immediately started feeling relief... Also as a side benefit it made my feet smooth not that I cared but something I noticed main thing was my itchyness was GONE!
I was surprised to find this actually works! I had several all over my arm and leg after watering the plants (strangely, the bites were only on my left side).
I rubbed a pinch of salt on each bite. Within moments the itch stopped, and within a couple hours the swelling was reduced to a small red dot, like a flea bite. The dots didn't disappear until a few days later, but they were inconspicuous and never itched again.
Try rubbing salt into a mosquito bite, just ordinary table salt. I tried it on a new itchy bite I thought was from a mosquito; the bite was gone the next day. Mosquito bites usually last days on me.