'Hamsaraja Nidana' is a text written by Acharya Hamsaraja in the time period between 15-17th Century A.D. The book was also well-known as 'Bhishak Chakra Chittotsava'. Acharya Priyavrat Sharma opined that 'Hamsarajeeya Vaidyaka' was the other name of this text.
In the earlier manuscripts and publications, chapter wise distribution is done. Here in this translation work, for the first time, it is alienated into different chapters, placing the relative information o the similar disease under one heading.
Some of the unique diseases mentioned in this text are drishti jwara, Mala jwara, Kheda jwara, kapila jwara, bhasmavikshepa jwara, tripada jwara, pingaksha jwara, mahodara jwara, jwaladwigraha jwara, tarunya kaleena hikka, vardhakya kaleena hikka, atishwasa, vegarodhajanya udavarta, brahmani roga (retra roga) etc.
As mention in the foreword note of Prof. M.S. Baghel, the unique features referred in some of the contexts, attracts special attention towards this book.