My pug has had this swollen lump on her front paw in between her toes for a couple weeks now. We had previously assumed it was some kind of fungus and had been keeping it clean. It still hasn’t hasn’t gone away and it’s pretty big and inflamed. It’s reddish brown and normally it didn’t hurt her when we touched it. It also doesn’t hurt for her to walk. My dad tried to pop it this morning and it just oozed a clear fluid which then turned a little bloody. Even after it was popped it didn’t seem to decrease the size. What could this be?

I have also included a photo.