My shih tzu had a big one a few years ago. It was a cyst. One day he was crawling in a tight spot and it popped. There was this gross cottage cheese looking stuff inside it. It's been gone ever since then. But, yeah, it's definitely best to get a doctor to look at it. Hopefully it's nothing serious. I've also seen dogs with lumps that kinda looked like it was under the skin and it turned out to be histiocytoma. |