Try not to worry too much. Duke's got a big lump on one side of his hip. It's normal. So, I hope this lump is normal, too. I know this one scared me because it's huge, about the size of the palm of my hand. I really didn't believe my vet until I saw another older dog that had them on both sides. Let us know what the vet says. Also, it could be a clogged hair follicle that's gotten infected. Duke had that, too. It had to be removed.