At present it is only possible to travel freely over land between Myanmar and Thailand. The India crossing (at Moreh, Manipur State) and the China crossing (at Ruili, Yunnan Province) both require a permit which is obtained separately to your visa. Crossing to Bangladesh and Laos is not permitted for foreigners.

THAILAND CROSSINGS

Four Thai/Myanmar border points are officially open to foreigners for through travel, and Thailand offers visa-free travel for the citizens of many countries; the length of the stay period depends on what country you are from – varying from 14 days to 3 months. Check here for more details.

The Mae Sot (Thailand, Tak Province) / Myawaddy (Myanmar, Kayin State) crossing point is the most practical place to cross for onward travel into Myanmar

At the passport control points (located on either side of the ‘Thai-Myanmar Friendship Bridge’ river crossing), there are separate windows for foreigners – you do not have to stand in the same (sometimes long) line as the locals.

https://www.go-myanmar.com/arriving-and-departing-over-land