It would be helpful to know the duration of the pain and the type. Nevertheless, constant pain over right side could be subsequent to the recent surgeries (Gall bladder removal/ Kidney transplant). It needs evaluation by a physician initially asking for relevant investigations; keeping in mind that he/she should not subject you to unnecessary analgesics! A Pain physician might get involved if needed and if the symptoms persist or if no definitive diagnosis has been reached. The options of pain relief vary from safer oral analgesics to interventional pain management strategies involving intra-lesional local anaesthetics an steroids or nerve blocks and nerve ablation.