What You Really Need to Know About Herpes Simplex Virus

Have you ever noticed tiny water-filled blisters on your lips or intimate areas, paired with an itchy or painful feeling? Or perhaps you have heard about this happening to a friend or family member? The cause is often the herpes simplex virus. While this condition can feel overwhelming at first, it is very common. Let us break down everything you need to know in a clear, simple way.

What is Herpes Simplex Virus?

Simply put, the herpes simplex virus, known as HSV, is a virus that can affect different parts of your body. However, it is most commonly found around the mouth, known as oral herpes, and the genital area, known as genital herpes.

When you get an HSV infection, meaning the virus enters your body, small fluid-filled blisters can form. These blisters eventually break open and form a crust on top. We call this a herpes outbreak. Sometimes, you can have the virus without noticing any symptoms at all. This means you might carry the virus without even knowing it.

The most important thing to know is that HSV spreads very easily. It passes from one person to another through skin-to-skin contact. The virus enters your body through your skin and mucous membranes. Afterward, the virus uses your cells to make copies of itself. We call this process viral replication.

Once you get this virus, it stays in your body for the rest of your life. Most of the time, it stays dormant. This it rests quietly. However, sometimes it wakes up, or reactivates, causing those familiar blisters to appear again. How HSV affects you depends on the virus type and your overall health.

There is currently no complete cure for HSV. Yet, do not worry because there are treatments available. These treatments can help control outbreaks and reduce the chance of passing the virus to someone else.

What are the Types of Herpes Simplex Virus?

There are two main types of herpes simplex virus:

• Herpes simplex virus type 1 (HSV-1).
• Herpes simplex virus type 2 (HSV-2).

Both HSV-1 and HSV-2 can cause infections around your mouth, known as oral herpes, or around your genital area, known as genital herpes. Both types can also cause infections in other parts of your body.

✨ Herpes Simplex ★ 4.6 · Clinical Pick

Saw Palmetto 500mg + Beta-Sitosterol, Pygeum, Pumpkin Seed Oil & Lycopene Prostate Formula

Comprehensive men's urological formula that reduces nighttime frequent urination (nocturia), supports strong urinary flow, and promotes healthy prostate volume (BPH).

View Clinical Details →

Where Does HSV Affect the Body?

The herpes simplex virus can cause infections in several areas of your body:

Mouth and Face.

Oral herpes infections cause blisters on your lips and around your mouth. People often call these cold sores. When some people get infected for the first time, they may get blisters and other symptoms inside their mouth too. Doctors call this condition herpetic gingivostomatitis. Very rarely, blisters can appear on or inside your nose. We call this nasal herpes.

Genital Area.

Genital herpes infections cause blisters in your genital area. These can appear in places you can see, such as the outer folds of skin in women or the shaft of the penis in men. They can also appear in places you cannot see easily, such as around the cervix.

Other Skin Areas.

The HSV virus can also infect your fingers. Doctors call this herpetic whitlow. Alternatively, skin infections can appear anywhere on your body, known as herpes gladiatorum. People who have atopic dermatitis, a skin condition similar to eczema, can develop a widespread skin infection called eczema herpeticum if they catch HSV.

Eyes.

The HSV virus can cause a serious eye infection called herpes keratitis, which is a type of ocular herpes. Because this can affect your vision, it requires prompt medical care.

Brain and Spinal Cord.

Think about this: the HSV virus can even infect your brain! Doctors call this herpes simplex encephalitis. It can also infect the protective layers surrounding your brain and spinal cord, known as herpes meningitis. Sometimes, both the brain and these protective layers become infected, causing a serious condition called herpes meningoencephalitis. These are more serious medical conditions.

Other Internal Organs.

The HSV virus can affect one or more organs in your chest and belly. Examples include the food pipe or esophagus, known as herpes esophagitis, the lungs, known as HSV pneumonia, and the liver, known as HSV hepatitis. These types of infections are most common in people with a weakened immune system.

What are the Symptoms of an HSV Infection?

The symptoms of an HSV infection vary depending on the type of infection. Here is how these symptoms typically show up:

• Oral herpes: Blisters on your lips or around your mouth. About 48 hours before the blisters appear, your skin may feel numb, itchy, or burning.
• Genital herpes: Blisters on and around your sexual organs. Up to 48 hours before blisters appear, you may experience fever, headaches, swollen lymph nodes, and itching or numbness in your genital area.
• Herpes gladiatorum: Blisters anywhere on your skin, especially on your arms, face, ears, or chest.
• Herpetic whitlow: Blisters on your fingers, color changes in the skin around your nail, and finger swelling.
• Herpes keratitis (ocular herpes): Eye pain or burning, a feeling that something is in your eye, sensitivity to light, and blisters on your eyelids or around your eyes.
• HSV encephalitis: Headaches, fever, focal seizures starting in one specific area, and changes in speech or behavior.
• Herpes meningitis: Headaches, fever, and sensitivity to light.

How Do We Get an HSV Infection?

You get an HSV infection through direct contact with someone who has an HSV infection. This means a part of your body must touch one of the following from an infected person:

• Herpes blisters, whether on the mouth or genital area.
• Skin or mucosal surfaces, such as inside your mouth, vagina, or rectum. These can transmit the virus even if visible blisters are not present.
• Saliva, semen, or vaginal discharge, which can transmit the virus even without visible signs of an infection.

When someone has HSV, the virus does not shed from everywhere on their body. The virus only sheds from the infected area, which is usually the place where HSV first entered the body.

For example, if someone has genital herpes, the virus can only spread from the skin, mucous membranes, and body fluids of their genital area. Their saliva does not transmit HSV unless they also have an oral herpes infection, which we will discuss later.

Similarly, if your partner has oral herpes but not genital herpes, you do not need to worry about catching HSV from sexual contact with their genital area. Your risk of catching HSV comes only from touching their mouth or saliva.

However, if your partner has both oral herpes and genital herpes, they can transmit HSV from both their mouth and their genital area. How the virus affects you depends entirely on which part of your body touches the virus. This is something worth examining closely.

What is the Incubation Period of the Herpes Simplex Virus?

The incubation period for herpes simplex infections, which is the time from when the virus enters your body until symptoms appear, can range from one to 26 days. However, it usually takes about six to eight days.

Some people become infected but do not show symptoms right away. Instead, it can take months or even years for symptoms to appear when the virus reactivates.

What Triggers a Herpes Simplex Virus Outbreak?

Several triggers can cause oral or genital herpes to flare up:

• Fever.
• Mental stress.
• A weakened immune system, caused by medicines or underlying health conditions.
• Hormonal changes, such as during your menstrual period.

Triggers specifically related to oral herpes include:

• Sunlight exposure.
• Upper respiratory infections, such as a cold.
• Injury to the mouth area.

Sometimes, herpes can break out without any clear reason at all.

What Are the Stages of an HSV Infection?

An HSV infection has three main stages:

1. Primary infection.

2. Latency.

3. Reactivation.

Primary Infection.

Primary infection describes what happens after the HSV virus enters your body. The virus travels to nearby nerve cells and begins to make copies of itself. If HSV enters through your mouth, it usually infects your trigeminal nerves. If it enters through your genital area, it usually infects your sacral plexus, a network of nerves in your pelvic region.

Next, HSV travels along your nerves to the nearest skin or mucous membranes. By this time, your immune system recognizes an intruder and starts sending immune cells. This causes inflammation and skin blisters. You might also notice swollen lymph nodes under your jaw or in your groin.

Some people have no symptoms during a primary infection, meaning they do not know they have HSV.

Latency.

Within a few weeks, your immune system brings the primary infection under control. However, the HSV virus stays inside the exact nerve cells it first infected. Doctors call this the latency stage. This means the virus lives in your nerve cells, but most of the time it stays inactive, resting quietly.

During the latency stage, most infected cells stay asleep, though a few may wake up at any time. Usually, this does not cause a herpes outbreak. However, sometimes infected cells wake up and cause enough disturbance for your immune system to notice. We call this HSV reactivation.

Reactivation.

Reactivation happens when infected cells wake up and trigger an immune response. Several things can happen at this point:

• Control within nerve tissue: HSV activity happens for a short time, starting and ending entirely within the nerve cells. Your immune system controls the virus before it reaches your skin or mucous membranes. People with HSV experience this often. The virus wakes up, shows slight activity for two to six hours, and stops. You do not shed the virus, develop symptoms, or pass HSV to anyone else.
• Asymptomatic viral shedding: Some infected cells reach the outer layer of your skin, called the epidermis. Even without enough virus activity to cause symptoms, the virus can shed. This means the virus can leave your skin and pass to someone else through direct contact. This viral shedding period is when HSV spreads most often from person to person.
• Symptomatic herpes outbreak: Infected cells multiply enough on your skin surface to cause visible symptoms. This is when you start seeing skin blisters. Most people think of this when they hear about a herpes outbreak. During this time, the virus easily spreads to other people through direct contact.

How Do Doctors Diagnose HSV Infections?

Doctors diagnose HSV infections through physical exams and medical tests. During an exam, your doctor looks for signs of an infection, such as blisters. They may take a sample from the blisters and send it to a laboratory. If your doctor suspects encephalitis or meningitis, they may perform a spinal tap to test fluid from around your spinal cord.

If you do not have blisters, your doctor can use a blood test to check for antibodies against HSV-1 or HSV-2. Antibodies show that you have had the virus in the past. Test results help your doctor plan the right care for you.

What Treatments Are Available for Herpes Simplex Infections?

Antiviral medicines prescribed by a doctor are the main treatment for HSV infections. These come in various forms:

• Pills you swallow.
• Creams or ointments you apply to your skin.
• Medicines given directly into a vein through an intravenous line, known as IV treatment.
• Eye drops for ocular herpes.

Your doctor will explain which medicine or medicines suit you best. Your treatment depends on:

• The type of infection you have.
• How severe it is.
• How well your immune system works.

They will also tell you the correct dose and how long you need to take the medicine.

Treatments for oral and genital herpes fall into two main categories: episodic therapy and chronic suppressive therapy.

What is Episodic Therapy?

This is a short-term treatment targeting a single event or outbreak. It involves taking antiviral medicine as soon as you notice the first signs of a herpes outbreak, such as skin tingling or itching. The sooner you take medicine, the better it works. Doctors use episodic therapy for initial HSV infections and repeat flare-ups.

Episodic therapy can help:

• Make symptoms less severe.
• Help pain go away faster.
• Help blisters heal quicker.
• Reduce the amount of virus shedding from your skin.

Important: Treating one outbreak does not affect future outbreaks. Episodic therapy cannot stop future outbreaks from happening or change how severe they will be. For that, you need chronic suppressive therapy.

What is Chronic Suppressive Therapy?

This means taking antiviral medicine every day for a long time. Doctors recommend this method for people with genital herpes who:

• Experience frequent or severe outbreaks.
• Have a weakened immune system.
• Have multiple sexual partners or partners who do not have genital herpes.

Doctors also recommend chronic therapy for people with severe oral herpes outbreaks or those who have at least six outbreaks a year.

Specific medicines your doctor may prescribe include:

• Acyclovir.
• Valacyclovir.
• Famciclovir.

Doctors usually use chronic suppressive therapy for people with genital HSV-2. They do not recommend it as often for genital HSV-1 because this type causes fewer outbreaks.

Chronic suppressive therapy can:

• Reduce your number of outbreaks by 70% to 80%.
• Make your symptoms less severe.
• Reduce viral shedding when you have no symptoms, which can help protect sexual partners.

Can HSV Infections Be Prevented?

HSV is a very common virus that spreads easily between people, making complete prevention difficult. However, you can lower your risk by taking these steps:

• Avoid close contact with anyone who has an active herpes outbreak. For example, do not kiss someone with a cold sore, and avoid sexual activity with someone who has active genital blisters.
• Ask partners to get tested for sexually transmitted infections, including herpes. Even someone without symptoms can pass HSV to you. Knowing if a partner has HSV helps you make safe choices.
• Use barrier methods, such as condoms or dental dams, during every sexual act. While these do not offer 100% protection, they reduce the risk of passing HSV between partners. Barrier methods do not cover every area where the virus can shed, but they cover several areas and also protect you against other sexually transmitted infections.

If you have oral or genital herpes, talk openly with your sexual partners about their risk. Both types of HSV can spread through various sexual activities. Make sure you and your partner agree on safety measures and testing.

Does Herpes Go Away Completely?

No, herpes simplex is a lifelong infection. The virus can reactivate from time to time and cause outbreaks. How often this happens varies greatly from person to person.

For most people with oral herpes, outbreaks become less frequent as they age, especially after age 35. Genital herpes outbreaks also tend to become less frequent over time. Genital HSV-1 causes outbreaks less often than genital HSV-2.

When Should I See a Doctor?

See a doctor if you notice symptoms of an HSV infection or think you were exposed to HSV. Your doctor will let you know if you need testing.

What Questions Should I Ask My Doctor?

If you have oral or genital herpes, asking your doctor these questions can help:

• What treatments do you recommend?
• How can I lower the risk of passing HSV to others?
• What is the chance of HSV spreading to other parts of my body?
• How can I prevent future outbreaks?

Is HPV the Same as Herpes Simplex?

No, human papillomavirus (HPV) and herpes simplex are two different viruses. HPV stands for human papillomavirus and does not belong to the herpes virus family. However, both HPV and HSV:

• Are very common.
• Spread very easily.
• Transmit through skin-to-skin contact.
• Can affect your genital organs.

Does Everyone Have Herpes Simplex?

No, but HSV is a very common virus. Researchers estimated that worldwide in 2016, about 3.7 billion people carried antibodies to HSV-1, meaning blood tests showed past infection. In that same year, nearly 500 million people carried antibodies to HSV-2. This shows how widely spread the virus is.

Can Someone with Herpes Simplex Donate Blood?

Yes, but only if all of the following are true:

• You do not currently have a herpes outbreak.
• Any recent blisters, on your mouth or genital area, are fully healed and dried.
• You meet all other requirements for donating blood.

To learn more about donation rules, speak with your doctor or the staff at your local blood donation center.

References & Further Reading:

• World Health Organization (WHO). Herpes simplex virus key facts. Available at: WHO HSV Fact Sheet.
• Centers for Disease Control and Prevention (CDC). Genital Herpes - CDC Fact Sheet. Available at: CDC Genital Herpes.
• NHS UK. Herpes simplex overview, symptoms, and treatments. Available at: NHS Herpes Simplex.
• Cleveland Clinic. Herpes Simplex: Causes, Symptoms & Treatments. Available at: Cleveland Clinic Health Library.
• Mayo Clinic. Herpes simplex - Symptoms and causes. Available at: Mayo Clinic Patient Care.