Post-Orgasmic Illness Syndrome
People with this rare condition develop flu- or allergy-like symptoms after they orgasm. Fever, stuffy nose, sneezing, headache, and itchy eyes can start within seconds, or up to a few hours, after sex. It can last for a few days. Doctors don’t know what sets off this reaction, but it’s more common in men. If you have this syndrome, allergy medicines or antidepressants may help.