νυγ-μός · nyg-mos — LSJ
pricking sensation, irritation, Ruf. ap. Orib. 8.24.62 : in pl., of gout, Luc. Ocyp. 30.
metaph., of the prickings of conscience, τῶν παρανομημάτων ν. εἰς τὴν ψυχὴν λαμβάνειν D.S. 13.58 ; but also, = νύγμα II, ὑπὸ νυγμῶν καὶ γαργαλισμῶν τῆς αἰσθήσεως Plu. Phil. 9.