HI I have gone through your mail, as you said your child has popping in ears and after removing lot of wax your doctor said that ear drum of child is dark , By considering the version of your doctor means your child has acute otitis media
and his ear drums are congested. you are advice to go for (1) X-Ray paranasal sinuses
, Audiometery and approach to an E.N.T.specialist for better care as this case demands specialist care. Thanks.