Hi. Thanks for your query. First of all getting a treatment directly from the pharmacy indicated you ae not serious about the problem of your child. The Medical field doesn t work like this. If you are serious about a child , who is your son too, I would advise the following with the history you have provided. * Clinical examination by a Surgeon / Pediatric Surgeon if you have in your city. This is important as a Doctor only can ask the proper questions. The proper history by you and your son can lead to a proper diagnosis. * X-ray of the chest and abdomen. * Ultrasonography of the whole abdomen- CT scan is done only if the Surgeon feels so. *The routine blood, urine and stool tests. The Treatment will all depend upon :: * The clinical findings, reports of the investigations and follow-up results after medical management. * A course of an antibiotic with Metronidazole, * Medicines for worms *Surgery if the cause is surgical such as appendicitis and so on.