A sex-specific illness is an illness that occurs only in people of one sex. In a more general sense, sex-related illnesses are illnesses that are more common to one sex, or which manifest differently in each sex.
Neither concept should be confused with sexually transmitted diseases, which are diseases that have a significant probability of transmission through sexual contact.
Sex-related illnesses have various causes:
Examples of sex-related illnesses in humans:
Men:
Women: