Located in the northwestern tip of India, the state of Arunachal Pradesh, covers a tremendous amount of terrain, not much smaller than the whole of Nepal. The former contained more than 40 hot springs so it's not surprising to see that Arunachal Pradesh has quite some thermal activity, though possibly less developed and / or visited. It's therefore understandable that there's less info on the internet available.
Reknown for the many different ethnicities, Arunachal Pradesh is distinctly remote, little roads offer any kind of access. Tawang district bordering both Tibet and Bhutan is accessible and contains largely Tibetean Bhudist ethnicities. As one of the most accessible mountain areas it's not surprising to find that (as is the case with Bhutan to it's east) there are a number of hot springs not far away from Tawang itself.
Other hot springs located in Tawang district are Kitpi (source) or Greng-khar (source), the former being the name of the village rather than the name of the hot spring (source PDF).
More to the east, Anjaw district contains two hot springs, one named Walong circle the other Kibithoo circle.