I have a wooden bed frame, for which one of the sides is very slightly bent out (as shown in the picture). I would like to get it straightened because the slight bending out means that the slats that support the mattress on that side aren't held in place as firmly, so occasionally fall out. The bed is about 7 years old and unfortunately the shop that sold me the bed has gone bust in the meantime - so I don't think there's any reasonable chance of getting a replacement.
Is there any reasonable way to fix this? I don't know that much about DIY, but wood doesn't seem like a good material for simply bending back into shape.
(NB. Picture shows the bottom corner of the bed at the front of the picture not fully in place, with a gap showing. Don't worry about this - the bed was disassembled for room redecoration and I haven't yet fully reassembled it, hence the gap)