Can an STD Stay Dormant?

Herpes, once acquired, stays in the body permanently and cycles between active outbreaks and dormant periods, sometimes with long stretches between outbreaks. HIV can go years without symptoms after the initial acute phase (if that phase is even noticed) before progressing further, which is exactly why routine testing rather than symptom-watching is the standard recommendation. Chlamydia frequently causes no symptoms at all for extended periods, sometimes discovered only through routine screening or a partner's diagnosis. HPV can remain present without any visible warts or abnormal cell changes for a long time before either clearing on its own (common) or eventually causing changes that get picked up on a pap smear.

This is the part that matters most practically: several of these infections can still be passed to a partner during a dormant or asymptomatic period. Herpes can shed and transmit without a visible sore present. HIV and chlamydia can both be transmitted by someone who has no idea they're carrying an infection. This is the core argument for routine testing on a regular schedule, rather than only testing when something feels wrong.