Hello everyone, this is the situation today. Today I found a blood spot on the bed sheet over which Tea was sleeping, I realised that the blister she has on the lip broke, I got evidence taking these photos after the break and 10 minutes later (the blister re-filled up)... Tomorrow I'm going to call vet to take appointment. I googled something about blisters and cankers, so I suppose it's something related to that (in an optimistic way)... I'm really nervous and bothered by this...