Correct spelling for the English word "nasha fever" is [nˈaʃə fˈiːvə], [nˈaʃə fˈiːvə], [n_ˈa_ʃ_ə f_ˈiː_v_ə] (IPA phonetic alphabet).
A fever of short duration accompanying painful congestion and swelling of the nasal mucous membrane; it has been described as occurring in certain parts of India, but its identity is questioned.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.