Final answer:
A person with renal calculi may experience severe episodic pain, nausea and vomiting, and bloody urine. The size of the kidney stones and their obstruction of the ureter can cause these symptoms.
Step-by-step explanation:
A person with renal calculi, or kidney stones, may experience symptoms such as severe episodic pain in the flank, lower abdomen, and groin (renal colic), nausea and vomiting, as well as bloody urine (hematuria). Kidney stones can vary in size and can cause obstruction of the ureter if they grow to a sufficient size. The obstruction can result in dilation of the upper ureter and renal pelvis, as well as muscle spasm trying to move the stone, leading to the associated pain and other symptoms.