Considering your little boy is 3.5 years with duplex kidneys with bilateral reflux (? resolved/ stopped), my first concern with him pressing the lower abdomen is i) does he have an urinary tract infection
- children find it very difficult to express the symptoms of an urinary infection and it is usually general things that point to it ii) second concern is does he have trouble passing stools too ? is he constipated ? does he pass very hard bolus of stool ?
Do revert with answers to above queries. Also could you mention the grade of the reflux on his previous studies