I'm just looking for some reassurance really. My 8 week old has a sucking lip blister that's been there over 4 weeks now. It started when I started using nipple shields due to bfeeding pain (he had a tongue tie which was snipped at 4 weeks). I am still alternating between using and not using the shields as its still not pain free. I have seen 2 GP's, a breastfeeding mentor, 2 health visitors and a lactation consultant regarding this blister and they've all said the same "I haven't seen one like that before but it'll just go". But I'm really concerned about it, it's swollen and red. He doesn't seem bothered by it in the slightest and all I'm putting lanolin on his lip but I can't help but worry. He and I have been tested for thrush and it was negative, and it's not a cold sore either. Anyone else had this? Any tips?