If there is large stone, he should brake it first. Jogging, back bending exercises, aerobics are very good mechanical ways to brake stones.

Thermal ways. Sauna, steam room, hot bath for general warming up or use hot water bottle locally.

I never tried herbs, but came across a few messages, so check archives.

The goal is to brake stones, shape them up and only then get rid of them, so choose the methods you like or can do, take your time in preparation for next flush.

The biggest stone I passed was 5 cm long, t-shape 3.5 cm wide.

Oleg