How to Tell the Difference Between HSV1 and HSV2?

Herpes simplex virus (HSV) is a very common viral infection that can affect both the mouth and genital area. There are two main types: HSV-1 and HSV-2. Both variants share similarities but there are some key differences in how they can be transmitted, where symptoms may appear and how often outbreaks may occur. [1]

Understanding the difference between HSV-1 and HSV-2 can help you recognise symptoms, reduce stigma and feel more informed about which antiviral treatments can help with long-term management.

Article Summary:

• HSV-1 is more commonly associated with oral herpes, while HSV-2 is known to affect the genital area. However, both types can occur in either area.
• Some people don’t notice any symptoms. People who do may experience blisters, sores, itching, burning or discomfort around genitals.
• Antiviral treatments can help manage outbreaks, reduce severe symptoms and keep you in control with long-term support.

What is HSV?

HSV refers to herpes simplex virus. It creates outbreaks of sores which can range from mild and uncomfortable, to extremely painful.

There are two main strains of the virus:

• HSV-1
• HSV-2

HSV-1 is commonly associated with cold sores around the mouth, but it can also lead to genital herpes through oral-to-genital contact. HSV-2 more commonly affects the genital and anal areas, and is typically spread through sexual contact. [2]

If you have it, you’ll notice liquid-filled sores on the skin. After a few days, the sores break to leave a yellowish crust on the skin. Outbreaks can last for around two weeks.

The first herpes outbreak is typically the most painful, and is often accompanied by headaches, flu-like symptoms and painful sores. Further outbreaks tend to be less severe and appear less frequently over time. These outbreaks are most likely to happen when your immune system is ‘down’ for some reason (such as when you’re fighting a cold, or sleep-deprived). [3]

HSV-1 vs HSV-2: key differences

The most obvious difference between HSV-1 and HSV-2 is where you experience outbreaks.

If you have HSV-1, your outbreaks will usually occur on the skin on your lips and around the mouth. Sometimes the sores will appear inside your mouth, and they can appear elsewhere on your skin. HSV-1 can also appear near your eyes.

HSV-1 outbreaks tend to happen about once per year, although everybody is different and sometimes they occur more often. Some people may not experience visible symptoms. [4]

If you have HSV-2, your outbreaks may appear on and around your genitals, buttocks and rectum:

• Women: You will notice the sores anywhere on the vulva (outside of your vagina), and often on the outer folds called the labia majora. They may also appear inside your vagina too, and around your groin area.

Genital herpes can be especially painful for women and may cause a burning sensation when you urinate.

• Men: You will normally notice the sores appearing on the penis itself, as well as on your testicles and around your groin. In rare cases, the sores may appear inside the penis, making it very painful to urinate.

HSV-2 outbreaks are usually more frequent than HSV-1, typically happening 4-5 times per year. However, as with HSV-1, this will vary from one person to another.

Do HSV-1 and HSV-2 look different?

Not usually. HSV-1 and HSV-2 can cause very similar symptoms, including:

• Small liquid-filled blisters
• Tingling or itching sensations
• Discomfort while urinating
• Sores around the mouth or genitals

HSV-1 vs HSV-2: which is worse?

A simple HSV-1 vs 2 comparison isn’t really the most useful way of understanding the virus. And in either case, HSV is a highly manageable condition. With an efficient herpes treatment, outbreaks can be easily and quickly brought under control.

What’s important to know is that both types of infections vary from person to person.

Can herpes be treated?

While genital herpes can be uncomfortable and frustrating, it’s also a very manageable condition. By understanding the differences between HSV-1 vs 2, and having the right treatments available as soon as you need them, you can get in control of herpes and carry on with your life.

Antiviral medications can help you manage herpes symptoms. Your treatment options include:

• Aciclovir: an antiviral medicine that helps stop the infecting virus from reproducing.
• Valaciclovir: A prodrug antiviral medicine that converts into aciclovir when it’s taken.

These medicines can help suppress outbreaks, and make outbreaks that do happen go away much faster.

If you need support to further understand the differences between HSV-1 vs 2 and what steps to take if you think you’ve contracted the virus, speak to our medical professionals and explore treatments with MedExpress.

References

1. Herpes in Hiding [Internet]. NIH News in Health. 2017. Available from: https://newsinhealth.nih.gov/2010/11/herpes-hiding
2. Virology Research Services. Herpes Simplex Virus: Understanding HSV-1 and HSV-2 | VIROLOGY RESEARCH SERVICES [Internet]. Virologyresearchservices.com. 2024. Available from: https://virologyresearchservices.com/2024/12/11/herpes-simplex-virus-understanding-hsv-1-and-hsv-2/
3. What does herpes look like: Pictures, treatment, and prevention [Internet]. www.medicalnewstoday.com. Available from: https://www.medicalnewstoday.com/articles/324838
4. Gorman J. HSV-1 vs HSV-2: What’s The Difference? | Your Sexual Health [Internet]. Your Sexual Health. 2022. Available from: https://www.yoursexualhealth.co.uk/blog/hsv1-hsv2-whats-the-difference/