So on the back of a recommendation on here a while ago, I tried the heating up thing that you put on your lip when you get a cold sore. I’ve done it with three cold sores now at first tingle and it’s stopped them all developing into a huge one. Combined with cream. It’s called the HerpoTherm Heat Treatment. It’s a bit ouchy when you do it but definitely worth it. I know it doesn’t work for everyone but thought I’d put it out there in case anyone wants to try. Costs about £25-£30.