Gay and bisexual men (GBM) are stigmatized in the Ghanaian society and that negatively affect their care-seeking behaviour. We sought to understand the experiences of care-seeking behaviour (CSB) for STIs among gay and bisexual men in Sunyani, capital of Bono Region, Ghana. A respondent-driven sampling was used to collect data from 17 gay and bisexual men in Sunyani based on phenomenological qualitative approach. The data were thematically analysed using the Atlas.ti software. Results were presented under various themes with appropriate accompanying excerpts. Two broad themes emerged from the data - personal and health system experiences of treating STIs. Personal experiences such as economic conditions, knowledge on STI, marital experiences and bisexual's partner awareness of sexual orientation had influences on CSB. Experience with cost of treatment, stigmatisation by health care workers (HCW) and perceived quality healthcare were the health system factors found to influence CSB. To help improve STIs care-seeking behaviour, government need to encourage and economically empower GBM, while at the same time, improving their knowledge on STI prevention and control. The National Health Authority should intensify and monitor the implementation of the national health insurance at the private healthcare sectors without favour and discrimination for gay and bisexual men.