I hv 2mm stone in bladder any non invasive way to break or dissolve it?

Drink a lot of water: 2 mm should pass without dissolution. To dissolve a stone, we need to know what kind of stone it is. If it is in your bladder, it is unlikely to cause a problem and should pass by itself. So, just drink plenty of water every day. If you continue to make new stones, ask your doctor about additional tests to identify a chemical imbalance in your urine.

Unnecessary.: If you are referring to a kidney stone, one that small will predictably pass on its own. Just drink a lot of water until it passes. Strain your urine if you can; if you catch the stone it can be sent to a lab for analysis of its composition. If it's truly in the bladder, it'll come out on its own.