Hi I Good evening. I am Dr Shareef answering your query. From the history of recurrent pain followed by formation of a lump on the lower right side of abdomen which is also painful points to the possibility of a undetected attack of appendicitis resulting in formation of an appendicular lump. Another possibility is the formation of a chronic ectopic lump in case of females which might cause bruising of the abdominal layers along with pain. If I were your doctor, I would advise you for an ultrasound of whole abdomen to know the site of origin of the lump along with some investigations like CBC, serum HCG estimation for arriving at a diagnosis for appropriate planned management. Till then, you could go for an anti spasmodic and a proton pump inhibitor for a symptomatic relief. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.