Nairobi, Feb. 12 -- Over the years, discussions on male sexual health have always revolved around erectile dysfunction and premature and delayed ejaculation, overshadowing other disorders that require prompt medical attention.

Few talk about a condition that causes men to have flu-like symptoms, extreme fatigue, weakness, loss of concentration and irritability immediately after ejaculation.

"Can a man have an allergic reaction to his own sperm? I mean, get sick an hour after ejaculating?" One man asked.

This condition is called post-orgasmic illness syndrome (POIS), says Ahmed Yousef, an urologist at the Aga Khan University Hospital in Nairobi.

The condition affects a small number of men. It causes a range of physical, cognitive, and ...