My 4 year old had dual otoplasty 4 weeks ago. One ear seems to have a cheese smell. What should I do? (Photo)

he has healed up great on one ear and the other seems to have a cheese smell and I can't see behind the ear and I was told not to move the ear at all so I can't see what's going on behind there. I trimmed the hair along side the ear to stop his itching just incase that was the problem and used a qtip to remove excess hair from the trim when swiping it through the first qtip has lots of cheese smelling gunk on it the second swipe through was light pink as if it's bleeding. What should I do?