I've woken up this morning with a fat lip. it's like a lump in my top lip, it's stinging a little and feels hot. anyone know how to bring it down or what it is?

Could be a blocked saliva duct or maybe just a spot under the skin, maybe just try putting some ice or peas on it to help with the swelling xxxx

can you see it or just feel it?

could be an ulcer.

Sounds like it could be a spot hun. Iv had them on my lipline a cpl of times and they quite stingy. Not much you can do except put germolene on it maybe. usually I wait until there a head on it and then squeeze- sore at 1st but heals quite quick, wait for the head but dont just pick!