STD stand for sexually transmitted diseases. It affects both sexes and largely results in infertility in both sexes. An individual with STD cannot and should not be treated in isolation, the sexual partners should be carefully traced out and treated. Laboratory investigations may be necessary to pin down the organism causing the STD. It is of utmost importance that an individual with STD seek medical doctor opinion for treatment and counselling. And while doing this all information requested for by the doctor must be supplied as this would go a long way in determining the success or failure of the treatment.
It may be possible to trace the origin of the STD to non human source as in the case of a person who carelessly used a toilet and thus get infected. Such toilet disease may end as STD if and when such individual has sexual intercourse with his/her partner.This individual so infected may transfer it to his/her other sexual partner. Thus multiple sexual partner is a great factor in the spread of STD.
Many of the STD do not have readily detectable symptoms [especially in the females]- it calls for high index of suspicion for some people to realise they are harbouring STD. For example many do not realise that vaginal discharge is not something to joke with.But because such discharge may be without pain or any discomfort, such an individual may be silent about it.