The most common reason that people develop cold sores on their mouths is due to becoming infected with HSV-1. (4) HSV-1 usually causes cold sore breakouts around the lips or mouth, or what some people describe as “fever blisters.” Someone can become infected with HSV-1 starting as a child, and then the virus can lay dormant in the body until the immune system is weakened, at which point symptoms can surface.
Do everything possible to prevent spreading it to other people. The virus cannot live long when it is not in contact with the skin, so door handles and towels are not likely to spread it. Do not share your personal belongings, like toothbrushes and combs.  Wash your hands with soap and water often, and immediately if you touch the sores.  This is important so as to minimize the chance of getting ocular herpes (herpes infection of the eye) which is a serious infection. Be especially careful around infants because their immune systems may not be fully developed. Little children often express affection with sloppy wet kisses. This is a common way to spread the herpes virus within the family.
Herpes, whether on the mouth or genitals, is caused by a family of over 70 related viruses. These viral infections cause small, fluid-filled blisters to develop on the skin and mucous membranes. There are actually eight different types of herpes simplex viruses that both children and adults can acquire, but two are by far the most common: HSV-1 and HSV-2.
When herpes flares up again, it is called a "recurrence" or "outbreak." Herpes does not always recur, and if it does recur, the timing and severity are different from person to person. Some people rarely have recurrences. Others have them often. Herpes is most likely to recur in the first year after infection. Recurrences may be more frequent for people with weakened immune systems.

Worldwide rates of either HSV-1 and/or HSV-2 are between 60 and 95% in adults.[4] HSV-1 is more common than HSV-2, with rates of both increasing as people age.[4] HSV-1 rates are between 70% and 80% in populations of low socioeconomic status and 40% to 60% in populations of improved socioeconomic status.[4] An estimated 536 million people or 16% of the population worldwide were infected with HSV-2 as of 2003 with greater rates among women and in those in the developing world.[10] Rates of infection are determined by the presence of antibodies against either viral species.[81]


Herpes infection can cause sores or breaks in the skin or lining of the mouth, vagina, and rectum. This provides a way for HIV to enter the body. Even without visible sores, having genital herpes increases the number of CD4 cells (the cells that HIV targets for entry into the body) found in the lining of the genitals. When a person has both HIV and genital herpes, the chances are higher that HIV will be spread to an HIV-uninfected sex partner during sexual contact with their partner’s mouth, vagina, or rectum.

If not treated immediately, it has potential  spread to other parts of the body. Being highly contagious in nature it gets readily transmitted by sharing utensils, clothes, and toothbrush. Maintaining sexual contact, kissing and touching also leads to the spread of virus. It is likely to spread more when the virus is present with physical outbursts. It is less contagious if the virus is present without any outward physical signs.
The frequency and severity of recurrent outbreaks vary greatly between people. Some individuals' outbreaks can be quite debilitating, with large, painful lesions persisting for several weeks, while others experience only minor itching or burning for a few days. Some evidence indicates genetics play a role in the frequency of cold sore outbreaks. An area of human chromosome 21 that includes six genes has been linked to frequent oral herpes outbreaks. An immunity to the virus is built over time. Most infected individuals experience fewer outbreaks and outbreak symptoms often become less severe. After several years, some people become perpetually asymptomatic and no longer experience outbreaks, though they may still be contagious to others. Immunocompromised individuals may experience longer, more frequent, and more severe episodes. Antiviral medication has been proven to shorten the frequency and duration of outbreaks.[79] Outbreaks may occur at the original site of the infection or in proximity to nerve endings that reach out from the infected ganglia. In the case of a genital infection, sores can appear at the original site of infection or near the base of the spine, the buttocks, or the back of the thighs. HSV-2-infected individuals are at higher risk for acquiring HIV when practicing unprotected sex with HIV-positive persons, in particular during an outbreak with active lesions.[80]
“Someone having HSV doesn't mean that they were reckless or irresponsible with their sex life,” says Sara, age 30. “I used condoms with all my partners, and I still caught it.” For Jamie, who contracted herpes from her husband three years into their monogamous relationship, he was her first and only sexual partner. And she says that he contracted it from one of his very first sexual encounters. No matter how and why someone contracted the virus, it doesn't erase their humanity and right to respect.

Both HSV-1 and HSV-2 infections are acquired from direct contact with someone who carries the virus. The infectious secretions that pass on HSV-1 or HSV-2 live on oral, genital or anal mucosal surfaces. They’re passed through skin-to-skin transmission, and any form of direct contact with sores on the mouth, buttocks or genitals can cause the virus to be passed.


HSV asymptomatic shedding occurs at some time in most individuals infected with herpes. It can occur more than a week before or after a symptomatic recurrence in 50% of cases.[33] Virus enters into susceptible cells by entry receptors[34] such as nectin-1, HVEM and 3-O sulfated heparan sulfate.[35] Infected people who show no visible symptoms may still shed and transmit viruses through their skin; asymptomatic shedding may represent the most common form of HSV-2 transmission.[33] Asymptomatic shedding is more frequent within the first 12 months of acquiring HSV. Concurrent infection with HIV increases the frequency and duration of asymptomatic shedding.[36] Some individuals may have much lower patterns of shedding, but evidence supporting this is not fully verified; no significant differences are seen in the frequency of asymptomatic shedding when comparing persons with one to 12 annual recurrences to those with no recurrences.[33]
When a herpes outbreak occurs, you can expect cold sores to take about 10–14 days to heal on average. During this time period, the virus is considered to be active, and you should be very careful to avoid direct contact between a sore and someone else. If after trying the natural remedies for herpes described above you still experience frequent recurrences, talk to your doctor for how to get rid of herpes symptoms. Sometimes immunity is suppressed due to another infection or virus, or even as a side effect of taking some medications, so be sure to rule these causes out.

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A herpes infection is caused by the herpes simplex virus (HSV). It has 2 main types, including HSV-1 and HSV-2. While HSV-1 can cause oral herpes, HSV-2 can be responsible for genital herpes. Oral herpes is also known as cold sores or fever blisters. It mainly occurs on the lips, around the mouth. Genital herpes is usually referred to as herpes. It mostly affects the genitals and anal area. Genital herpes is considered to be a sexually transmitted disease. It’s extremely contagious and can be spread through sexual intercourse.
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