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Cold Sores

Cold sores, also known as fever blisters, are caused by the herpes simplex virus (HSV-1). They appear as small fluid-filled blisters on or around the lips and are contagious. Symptoms include tingling, blisters, and eventual healing. Treatment options include topical creams, antiviral medications, and patches. Prevention methods include avoiding contact with infected individuals and maintaining a healthy immune system.

Best medications for Cold Sores

Drug NameClassRouteStandard DosagePrice
DenavirHerpes Virus Nucleoside AnaloguesExternal1 %from$186.32
ZoviraxHerpes Virus Nucleoside AnaloguesExternal200, 400, 5, 800 %from$9.80
SitavigHerpes Virus Nucleoside AnaloguesBucal50 MGfrom$13937.84
ValtrexHerpes Virus Nucleoside AnaloguesOral500, 1 MGfrom$20.39
FamciclovirHerpes Virus Nucleoside AnaloguesOral500, 250, 125 MGfrom$14.55
AbrevaHerpes Virus Nucleoside AnaloguesExternal10 %from$6.17
XereseHerpes Virus Nucleoside Analogue / Corticosteroid CombinationsExternal5-1 %from$1192.23


Cold sores, also known as fever blisters, are a common viral infection characterized by small fluid-filled blisters that appear on or around the lips. They are caused by the herpes simplex virus (HSV), primarily HSV-1. Cold sores are contagious and can be easily transmitted through close personal contact, such as kissing or sharing utensils. While they can be uncomfortable and unsightly, cold sores generally heal on their own within a couple of weeks. This article will provide an overview of cold sores, including their symptoms, causes, treatment, and prevention.


Cold sores often begin with a tingling or burning sensation in the area where the blisters will eventually develop. This is followed by the formation of small, red bumps or fluid-filled blisters. These blisters may be painful and can break open, oozing clear fluid. Over time, a crust or scab will form, which eventually falls off, leaving behind healed skin. Cold sores can also be accompanied by other symptoms, such as fever, sore throat, swollen lymph nodes, or general malaise.


The primary cause of cold sores is the herpes simplex virus, which exists in two forms: HSV-1 and HSV-2. HSV-1 is the main culprit behind cold sores, while HSV-2 typically causes genital herpes. Cold sores are highly contagious and can be spread through direct contact with an infected person. The virus can be transmitted through kissing, sharing personal items like razors or towels, or even by touching a cold sore and then touching another part of the body. Additionally, cold sores can recur due to triggers such as stress, fatigue, sun exposure, hormonal changes, or a weakened immune system.


While cold sores typically resolve without treatment, various remedies can help alleviate symptoms and promote faster healing. Over-the-counter creams or ointments containing antiviral medication, such as docosanol or acyclovir, can be applied topically to reduce pain, itching, and healing time. Cold sore patches or bandages can also provide a protective barrier and conceal the blister. In some cases, antiviral medications in pill form may be prescribed for severe or recurrent outbreaks. These medications work by slowing down the replication of the virus within the body, thus speeding up the healing process.


To reduce the risk of contracting or spreading cold sores, it is important to take necessary precautions. Avoid close personal contact with individuals who have active cold sores, especially during the blistering stage. Refrain from sharing items such as lip balms, utensils, or towels. It is also advisable to wash hands frequently, particularly after touching a cold sore. Sunscreen or lip balm with a high sun protection factor (SPF) can help protect the lips from sun exposure, which can trigger cold sore outbreaks in some individuals. Maintaining a healthy immune system through regular exercise, proper nutrition, and adequate sleep can also aid in preventing cold sore outbreaks.


Cold sores, caused by the herpes simplex virus, are a common viral infection that affects many individuals. While they can be uncomfortable and aesthetically displeasing, cold sores typically heal on their own within a few weeks. Various treatments are available to alleviate symptoms and promote faster healing. By taking necessary precautions and adopting preventive measures, the risk of contracting or spreading cold sores can be minimized. If you experience recurrent or severe outbreaks, it is advisable to consult a healthcare professional for further evaluation and guidance.