What to expect from STI screening for genital herpes

A clinician may inspect blisters, ulcers, or irritated skin and gently collect fluid or cells from a fresh sore. This sample can identify herpes simplex virus from the affected area. Testing is more informative while a lesion is visible, so contact a clinic promptly if a new sore appears.

A blood test looks for antibodies made after infection. It cannot show exactly when infection occurred or identify the site of infection, and it may not be useful for every person without symptoms. A positive result should be discussed with a clinician in context.

Tell the clinician about genital, anal, or oral sores, their first appearance, and any recent sexual contact. Mention pregnancy, immune conditions, and medicines. Avoid sexual contact when sores or warning tingling are present, and use barriers while discussing risk and results with partners.

Ask how and when results will be shared. A negative swab does not always exclude infection if the sore is healing or the sample is limited. Do not use another person’s treatment; prescribed antiviral medicine works best when started according to clinical advice.

Arrange prompt medical assessment for painful genital sores, burning when passing urine, or a new rash after sexual contact. Seek urgent help for inability to pass urine, severe illness, eye pain or redness, confusion, or a severe headache. Pregnant people with new sores should contact their maternity or medical team promptly.

Which sample is appropriate for me, and is a lesion available to swab? What can this result tell me about infection and what can it not tell me? When should I avoid sex, and how should I tell a partner?