Genital herpes infections are caused by herpes simplex virus type 2 ( and increasingly type 1 ). Most people don't know they have it, but estimates are 1 in 10 ( 6 m in UK ; no reliable figures for Philippines ; commoner in USA ).
It's "cold sores gone south" when there are symptoms - painful blisters, and feeling unwell. It is only transmitted by sexual contact - oral sex is a common route.
Outbreaks are never life-threatening, tend to get less severe with time, and effective treatment is available ( in the minority with repeated symptoms - 6 / year ) although the virus is never cleared from the nerve cells supplying the affected skin. Topical treatments ( ointments applied to skin ) don't work.
In pregnancy ( 10 cases / year in UK ) caesarian section may be recommended.
It can be diagnosed clinically and proved by virus culture, but in the absence of symptoms a blood sample would be needed.
Transmission from individuals with no symptoms and in monogamous ( 1 to 1 ) relationships can occur after many years.
It's impossible to prove who transmitted the virus to whom and when. A current partner may already have the virus and be unaware of it.
The main complication of genital herpes is psychological because of the stigma attached to this condition. Above all, reassurance is needed that - unlike another sexually transmitted viral infection ( HIV/AIDS ) - this is NOT a life-threatening condition.
Avoidance of sexual contact when any suggestive symptoms are present, and use of condoms, may help in the minority where symptoms are actually present.