My black lab mix just went through surgery today. We pick her up at 4:30. She had a fatty tumor on her left hind leg on the flabby part of skin. She got through it ok, but she won't stop whining. We called the vet and they said to give her an aspirin and we did. She is whining while I'm doing this thread. Please, does anybody now what's wrong with her?

It sounds to me like she is in a lot of pain & may need to be seen again by your vet. I've had surgery & I needed a lot more than an aspirin for pain relief for at least a week following. I'd call the vet & let them know the aspirin doesn't seem to be doing the job.

hope she's feeling better soon!