According to the locals from Praling and the care taker, the history of Dumang tsachu dates back earlier than 8th century. It is believed that, a hunter from Kamjoung village discovered the hot spring accidentally. The hunter shot a deer which fell off the steep mountain leaving a bloody trail. The hunter searched down the mountain and the deer was found dead at the base of the cliff where hot water which was leaking out from the rocks where the tsachu is currently located. Hunter reported about this to one of the Drupthop (Saint) who endorsed this as a tsachu. Later Guru Rinpoche blessed the tsachu and his Nay is currently found at the tsachu.

Dumang tsachu was officially recognized as a Tsachu in 1972, building a local bridge connecting people of Gongphu and Dumang Chiwog to Praling.The Tshachu has the ability to heal various sickness like Gastritis,piles,headache,joint and body ache.People from all over the country flock to the hot spring at this season of the year with hope to heal both physically and Spiritually.