Hi, many thanks for the query!
May be these stones have moved out of kidney
now into ureter
You need to do- USG KUB, X-ray KUB, RFT, CBC, Urine (R/M).
Excessive contractions of the obstructed ureter, to get rid of the stone,
stones cause bleeding in urine due to spikes on their surface that cause mechanical trauma to mucosa in urinary tract
Take antispasmodics, pain killers, diuretics with your doctor's opinion.
Drink plenty of water so that at least 2 litres of urine is voided in 24 hrs.
Wish you a good health.