what are the reasons for calcified patches(1-2) in kidneys?

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Calcified patches in the kidneys are usually indicators of renal stones.

Renal stones present with pain that is spasmodic or colicky in ‎nature, ‎‎‎‎‎‎‎‎‎originating ‎in the flank and radiating to the lower belly and inner thigh. It is ‎associated with other ‎‎‎‎symptoms like ‎‎‎‎‎nausea, vomiting ‎and systemic features due to any infection.

Treatment of urinary stones usually includes pain medication and increased fluids (to drink) until the stone is ‎passed. Over the ‎‎counter pain medication (eg, ibuprofen, Advil, Motrin) may be helpful. If the pain is not controlled, ‎a stronger ‎‎medication (narcotic) may be needed ‎

Small stones (less than 5 mm) usually pass without treatment. Larger stones (greater than 9 ‎mm) rarely pass on ‎‎their own and need specific treatment at a hospital with measures like ESWL and cystoscopic retrieval of stone.‎

Hence you might consult with your doctor and seek proper treatment.
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