Thanks for your question on Healthcare Magic. I can understand your concern. Main function of kidney is excreting body s waste by urine. So when you are not having urine production, it is an indirect indication that your kidneys are not working properly . So get done kidney function test (creatinine and urea) to confirm kidney damage. Burning in your vagina is mostly due to dryness of vagina due to chemotherapy. So drink plenty of fluids orally and keep yourself hydrated. You can use lubricant jelly. And please consult doctor for kidney failure. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.