Are they hard or do they seem to be filled with fluid? I saw something similar once with a snake that had scale rot (it had the scale rot when I obtained it). The bumps were actually filled with a clear fluid. The bumps were drained and cleaned with chlorhexadine/novalsan and then kept dry (if they filled back up they were drained and cleaned again). After about 2 sheds they went away and the scale rot cleared up.