Bacterial STDs are transient which means they will respond to medication and can be kicked out of your system. However, if they remain untreated they can cause very serious damage. Viral STDs are permanent. Once you acquire one, it stays in your system forever. You will not be troubled by a viral STD as long as it remains dormant, but they do act up now and then.
Some strains can lead to cervical cancer.
Sexually transmitted skin infestations are caused by tiny bugs called arthropods. Using pesticides will easily rid you of them. The two most common are pubic lice, a.k.a. Pubic lice attach themselves to the base of pubic hairs where they bite the skin and lay their eggs. Scabies burrow into the skin to lay eggs.