The workers of Keya Nit Composite garment factory in Gazipur's Konabari area fell ill for reasons yet unknown, the Dhaka Tribune reported.
Konabari police outpost Sub-Inspector Mobarok Hossain said the workers have been admitted to area hospitals.
Konabari Sharif General Hospital's doctor Khan Sharif said more than 100 workers were taken to the hospital this morning.
"We are assuming that the workers are suffering from mass hysteria," he added.
Following the incident, hundreds of workers of the factory stopped their work and started demonstrations.
In June 2013, nearly 500 workers of a garment factory near Dhaka were admitted to hospitals after drinking contaminated water.