Mods im not 100% sure if i've put this in the right place - feel free to move it :d

yesterday and last night i saw some spots on DJ, thinking it was mozzie bites i didnt do much about it then last night we found more - no mozzies. they're mainly on his face and a few on his back. then thismoring (with two more having popped up after brekkie) i combed though his hair and guess what we found. a flea! the joy in squishing that little pest was brillaint. i've sprayed our carpet with flea stuff - the cats where done about two days ago - i think my brillaint FIL only used half a thingy of the stuff on the cats last time, which is kind of pointless as our male alone is 10.2kg but we havent had issues with fleas since we moved in (last owner had a mangey looking dog that that them!) our cats are mainly indoor cats - so dont really see other cats, so how we got them i dont know!

so my questions are:
how do i help heal the bites (they look like bad mozzie bites, with one bad one - maybe a dubble bite on the back of his head within his hair line) and maybe take the itch out of them for the poor tacker?

i've spraied the carpet - i'll be getting DH to run over it with the Vac - whats something safe and possably natural that i can use to stop 'em comming back? (or at least try)