Okay, this is odd, I really don't know what to make of this, I might be overconcerned... but I thought I would get an opinion.

Becker is still quite small, but he's clean, mite free, eating well, friendly, growing fast, breathing normally, not producing any kind of mucus from anywhere, pooping etc totally normally, and has just finished a shed fine. However, whilst having a handle this morning, I noticed this... and this was a NIGHTMARE to photograph I can assure you but here:

It is only on that side, doesn't seem to be bothering him and doesn't seem sore... but... it wasn't there before.


So... what is it? Any ideas? Any suggestions on what I should do? Soak him? Put something on it?