What would cause swelling and internal pressure to the point of extreme pain in the kidney area?

64 year old black male, paralized from the chest down, recently diagnosed with 4th stage cancer of the liver,stomach and lungs is having regular episodes of swelling in the kidney area. This is causing in internal pressure to the point of extreme pain.Patient also has severe pressure absesses on the coxyx and upper hamstring muscles,is borderline diabetic and asthematic. Asthema being treated with: Albeuterol 90mcg inhaler and asmanex 30 220mcg. Diabetes with: Avandia 4mg. Other prescriptions: Ranitidine 300mg(ulcer preventitive); Megestrol AC 40MG;Vitamin C 500 mg; Dok 100mg;Ferrous sulfate 325mg and Vitaplex Plus

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What could a sharp pain in the kidney area mean?

I am not saying in the kidney but around that region.
I was laughing while watching a funny show on TV when I had a sudden sharp pain in the region; it really hurt but after 5 minutes or so, I was fine. This happened to me before but it turned out to be nothing. What could this mean?
P.S.- It was kind of like a really bad cramp.

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Any homeopathic remedies for dissolving kidney stones?

My father in law has chronic recurring kidney stones. I have never used homeopathy as a form of treatment so I am pretty new to all of this. I have read about it and understand the basic concept of it but since there no homeopaths here where I live I would need specific information on how to administer it & a good website so that I can purchase remedy. I have asked him what his sympthoms are and all he says is that he has pain in the kidney area and can not urinate all in one round. He walks, & jumps around alot and can not sitdown or lie down. Any info would be appreciated.
Thanks in advance~
Something for pain would also be great.

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