About 90% of stones 4 mm or less in size usually will pass spontaneously.In most cases, a smaller stone that is not symptomatic is often given up to four weeks to move or pass before consideration is given to any surgical intervention as it has been found that waiting longer tends to lead to additional complications.
There are various measures that can be used to encourage the passage of a stone. These can include increased hydration i.e. drinking 1-2 litres of water a day.This helps in easier passage of the stones.
If pain is severe, which it usually is , get prescription pain medications for the same.Some doctors will give patients with recurring passing of small stones a small supply prescription for hydrocodone to avoid a future visit to the ER when the next episode occurs. Taken at the first sign of pain, hydrocodone can eliminate much of the acute pain, nausea and vomiting which necessitates the hospital visit and still facilitate stone passage, although a follow-up with a physician is still necessary.