Welcome to health care magic.
1.The symptoms and history suggest most possible cause could be degenerative cause in the spine causing the
radiating pain to the thighs. For which you try back exercises that will help for sure.
2.The second possible cause could be renal
callus with UTI -
urinary tract infection - for which as a remedy take plenty of water.
3.For definitive diagnosis you need to get an
ultrasound scan of abdomen and pelvis done.
4.Ultrasound will help in evaluate the possible causes like
renal stones,bladder infection and evaluate the lumps what you are feeling in the lower abdomen.
5.Suggest you to get an appointment with your GP get examined and request for an ultrasound scan for further evaluation. Good luck.
Hope i have answered your query,
any thing to ask do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888