If you’re suffering from painful kidney stones, to ease symptoms, the NHS recommend to take painkillers, such as ibuprofen.
Other helpful measures include drinking plenty of fluids throughout the day (but not cranberry juice), and to take anti-sickness medicine.
The usual rhetoric is to drink two litres of fluids daily, but when you have a kidney stone, this needs to be increased.
When trying to flush a painful kidney stone from your body, you need to drink up to three litres of fluid daily.