Dinda was struck hard on his forehead when opening batsman Vivek Singh hit a straight drive in the fourth ball of an over.
Dinda did bowl a couple of deliveries after that but was sent for scans at a city hospital later.
"We did not find anything major in his scan report. He has been advised two days rest," an hospital source said.
The 2011 champions Bengal open their domestic T20 campaign against Mizoram in their group D fixture at the Barabati Stadium in Cuttack on February 21.
Bengal failed to make the final at home last season after finishing third in the Super League Group B.