Do subclinical lesions cause symptoms? How are they discovered and what types of HPV causes them?

No, they cause no symptoms and can only be found with magnifying instruments, like the colposcope or microscope (with a Pap-test and biopsies). Another way to identify a subclinical infection is to test directly for the virus DNA (e.g. taking an HPV test from the cervix).

All genital types of HPV (low and high-risk) cause subclinical lesions.