Turtle Toe Infection/Sore

by Phoebe
(Australia)

Hi, I have an Australian freshwater Burnett River Turtle, and on his left foot (in between his toes) around the webbed area on his toe, is a big brownish coloured sore, which is a very hard lump (almost wart like).

I am worried this may be a serious infection, or something that could impact his health.

Please give me any ideas on what may have caused this, and whether he will require treatment.

Any info would be greatly appreciated.