Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Herpes Simplex 1 IgG
The HSV-1 IgG test detects antibodies to herpes simplex virus type 1, which commonly causes oral herpes (cold sores). HSV-1 is very widespread, with a majority of adults carrying the virus, and it can also cause genital herpes through oral-to-genital contact.
What It Measures
This test measures IgG antibodies specific to herpes simplex virus type 1 in your blood. IgG antibodies develop after initial infection and remain present in the body for life, indicating current or past infection.
A positive result means you have been exposed to HSV-1 at some point. It does not indicate when the infection occurred or whether you are currently experiencing active symptoms. The test cannot determine the location of infection (oral or genital).
Why It Matters
Understanding your HSV-1 status can inform your approach to sexual health and help prevent transmission to partners. While HSV-1 is extremely common and most people experience mild or no symptoms, the virus can be transmitted even in the absence of visible sores.
Knowing your status is particularly relevant if you or your partner are immunocompromised, as herpes infections can be more severe in these cases. It also provides context for any recurring cold sores or unexplained genital symptoms.
When to Test
Testing may be considered as part of a comprehensive STI panel, when investigating the cause of recurrent cold sores, or when a sexual partner has been diagnosed with herpes. It can also be helpful for individuals who are planning a pregnancy or who are immunocompromised.
Note that routine HSV screening is not recommended by all health authorities due to the high prevalence and generally mild nature of HSV-1. Discuss with your healthcare provider whether testing is appropriate for your situation.
Recommendations
Male
Negative result indicates no HSV-1 exposure. Practice safe sexual practices.
Positive result indicates past HSV-1 exposure. Most people are asymptomatic. Consider antiviral medication if experiencing frequent outbreaks.
Female
Negative result indicates no HSV-1 exposure. Practice safe sexual practices.
Positive result indicates past HSV-1 exposure. Most people are asymptomatic. Consider antiviral medication if experiencing frequent outbreaks.
Lifestyle Tips
Avoid kissing or oral sexual contact during active cold sore outbreaks to reduce transmission risk. Use sunscreen on the lips and manage stress, as these are common triggers for outbreaks. Antiviral medications can help reduce the frequency and severity of recurrences.
Open communication with sexual partners about herpes status helps make informed decisions together. Remember that HSV-1 is extremely common and carrying the virus is not a reflection of personal hygiene or behaviour.