In Africa, the stigma around mental challenges makes it almost impossible to open up to anyone or seek help. In relationships, it gets even more complicated. You do not know how, when, and if you should say anything about it for fear of how they may react.
Daunting as it may be to face your husband or wife, this should not be something you need to hide. Like any other medical condition, you must disclose this to avoid future misunderstandings that can be resolved with communication, honesty, and transparency.