Yes, the swelling should decrease within a day or two after the end of the heat cycle.  If your dog is licking it, this is normal and there is no need to worry.

I just went through this with my Corgi.  First, you'll need to check the dog's stool to see if the blood appears to be throughout the stool (mixed in) or if it just on the outside.  If it's mixed in with the stool you'll need to get him/her to the vet right away.  If it's just on the … Read more