I have about 16 adult ball pythons. I had purchased one that had a lump/scab on the middle of her head(didn't realize until after). It was crusty looking, and looked bad. After about 4 months and a shed she's perfectly fine and there is no more scab, completely flat. However, since then 4 of my other snakes have gotten it. All crusty looking scabs in the middle of their nose at the same place. At first I had thought it was from feeding live and possible scratching from the rats, however I've had a snake that was off feed for a bit and she has it too. It's too far back on the nose for nose rubbing on the bins to be possible. I'm really worried that this could be a possible skin infection somehow passed on? Has anyone else ever dealt with this before?