My brother has a feeling of stiffness in his lower right abdomen. This stiffness is generally after eating something after a long duration. Also he is having irritation in his urinary tract. The frequency of urine is very high but each time only a small quantity of it is discharged. There is pain and irritation during passing urine. When he takes a brisk walk the stiffness and pain somewhat goes away. What is wrong with him? What should we do?