The actor was having trouble with a prosthetic fitting designed to make him look hairless because of the extreme heat in Diu, according to Mumbai Mirror.
A unit hand told the paper: "The first two days of shooting - at a factory in Mumbai - went smoothly. Trouble began when they started shooting in Diu.
"It started looking scary. The make-up started melting and dripping down Sanju's face."
Dutt has had a wig prepared in order to maintain continuity with his other current projects, which include the films Ready and Rascals.
Agneepath is a remake of a 1990 Bollywood film, which will see Hrithik Roshan taking on Amitabh Bachchan's orginal role.
