Hello and thank you for your post on e health forum.
The likelihood that a ureteral stone will pass appears to be determined by its size (i.e., greatest diameter).
Stones less than 4 mm , usually can be treated by conservative measures and hydrotherapy.
Conservative approach with hydration therapy can be used for 2-3 weeks to allow the stone to move out.
If your kidney stone is caused by an excess of calcium, you may be advised to reduce the amount of oxalates in your diet. Oxalates prevent calcium from being absorbed by your body, and can accumulate in your kidney to form a stone.
Foods that contain oxalates include: beetroot, asparagus, rhubarb, chocolate, berries, leeks, parsley, celery, almonds, peanuts and cashew nuts, soy products, grains, such as oatmeal, wheat germ and wholewheat,
To avoid developing a uric acid stone, you should reduce the amount of meat, poultry and fish in your diet. You may also be prescribed medication to change the levels of acid, or alkaline, in your urine.
Renal stones are not usually associated with diarrhea.
I hope this helps.