This trainer toolkit is a guide for Neglected Tropical Diseases (NTD) program implementers in Nigeria to train primary health care health workers to diagnose and provide care for women and girls with symptoms of female genital schistosomiasis (FGS). It has been developed based on a pilot study in Ogun State where 22 health facilities were trained on using the FGS tools. The trainer guide should be used alongside the ‘Health Worker Training Guide for managing FGS within primary health care’. Trainers should familiarise themselves with this manual before the training to ensure that all aspects of the training are conducted effectively.