Take I-95 South to Exit 4 and merge onto I-295 South.
Next, take I-295 to Exit 9B, which will bring you to Route 146 North.
Follow all signs to Route 99 North/Woonsocket.
Follow Route 99 until it ends, which will be at the intersection of Route 122.
Turn left onto Route 122.
Continue on until you have passed through four sets of lights.
At the fifth set of lights (Dunkin' Donuts will be on your right), bear right onto Cass Avenue.
Ocean State Pain is on the right, located in the building next door to the Landmark Medical Center's emergency room.
Parking is in the back.