
Probably needs stitching as well, very tightly. My Golden had it happen last year, he ended up with 30 stitches in his ear which had to stay in for a full month -the longer the better the vet said, to stop it from recurring. (I had another Golden about 15 years ago who only had his lanced, and it does come back.) He looked awful for a while and the ear leaks a lot of gunk to start with but he's absolutely fine now. I did ask the vet if it had to be done, it wasn't really bothering him and he's old, but the vet said it would just grow bigger and could get really bad if left unattended.(The term "cauliflower ear" comes from untreated haematomas, when the ear shrivels up and thickens, but apparently if you're unlucky it can get so bad the ear can actually fall off.) We left it for a few weeks to see and sure enough it doubled in size.
In older days they used to stitch buttons into the ear.

So sadly it's bound to mean surgery but it is only minor. :)