your child is having pain in right side in front and above hip bones and soreness all over many areas in body, it means this child is having some blood changes means might be TLC
rise or possibilities of having appendicitis
, therefore you consult with any surgeon or investigate blood count and level of electrolytes , so ultimate conclusion can be made for diagnosis of child problem.
Further I advice you to start antibiotic course along with some analgesics round the clock for 5-7 days.
Hope you will find solution and good luck