Cold Sores

Cold Sores


Cold sores are a common viral infection caused by the herpes simplex virus, affecting millions of people across the UK. They typically appear as small, fluid-filled blisters on or around the lips, often causing discomfort, tingling, and redness. Whether you experience occasional outbreaks or frequent flare-ups, a range of effective treatments is available, including antiviral creams, patches, and prescription-strength tablets. Getting the right cold sore treatment quickly can help reduce healing time and ease symptoms.

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What Are Cold Sores?

Cold sores are small blisters caused by the herpes simplex virus type 1 (HSV-1), though in some cases HSV-2 can also be responsible. They most commonly develop on or around the lips, chin, or nostrils. Once a person is infected with the virus, it remains dormant in the body and can reactivate at any time. Cold sores are highly contagious and can spread through direct contact. They are extremely common in the UK, with many adults carrying the virus.

Cold Sores Caused by HSV-1

The vast majority of cold sores in the UK are caused by herpes simplex virus type 1 (HSV-1). This strain is typically contracted in childhood and remains in the nervous system for life. Stress, illness, or sun exposure can trigger a reactivation, leading to visible cold sore outbreaks around the mouth area.

Cold Sores Caused by HSV-2

Although less common in the oral region, herpes simplex virus type 2 (HSV-2) can also cause cold sores. This strain is more commonly associated with genital herpes but can affect the face through direct contact. If you are unsure about the nature of your symptoms, it is advisable to consult a pharmacist or GP.

What Causes Cold Sores and What Are the Symptoms?

Cold sores occur when the dormant herpes simplex virus is reactivated. A range of triggers can cause this to happen, and many people find they experience outbreaks repeatedly throughout their lives. Recognising the early warning signs can help you begin cold sore treatment online UK searches sooner and start therapy at the most effective stage.

  • Tingling or itching: Often the first sign, felt around the lips before a blister appears
  • Redness and swelling: The skin around the affected area may become inflamed
  • Fluid-filled blisters: Small, painful blisters that cluster around the lips or mouth
  • Crusting and scabbing: Blisters burst and form a crust as the sore begins to heal
  • Triggers: Common causes include stress, fatigue, cold or flu, hormonal changes, and prolonged sun exposure
  • Weakened immune system: Illness or certain medications can lower immunity, making outbreaks more likely

How Do Cold Sore Treatments Work?

Cold sore treatments work by targeting the herpes simplex virus to reduce the severity and duration of an outbreak. The sooner treatment is started — ideally at the first sign of tingling — the more effective it tends to be. There are several types of treatment available, each working in a slightly different way.

Antiviral Creams

Topical antiviral creams, such as those containing aciclovir or penciclovir, work by inhibiting the replication of the herpes simplex virus. Applied directly to the affected area several times daily, these creams are widely available over the counter and are among the most popular forms of cold sore remedies for fast relief.

Cold Sore Patches

Cold sore patches are hydrocolloid dressings that cover the blister, protecting it from bacteria and further irritation while creating a moist healing environment. Cold sore patches UK customers find them particularly useful for daytime wear, as they conceal the sore and reduce the risk of spreading the virus through touch.

Antiviral Tablets

For people who experience frequent or particularly severe outbreaks, cold sore antiviral tablets UK pharmacies dispense — such as aciclovir or valaciclovir — may be recommended. These prescription-strength oral antivirals work systemically throughout the body to suppress viral activity. You should speak to your GP or a qualified pharmacist to discuss whether antiviral tablets are appropriate for your situation.

Are There Any Side Effects?

Most cold sore treatments are well tolerated when used as directed. Topical creams may occasionally cause mild skin irritation, dryness, or a temporary burning sensation at the application site. Cold sore patches are generally very gentle on the skin. Antiviral tablets can, in some cases, cause headaches, nausea, or dizziness. If you experience any unexpected reactions, stop use and consult a pharmacist or GP promptly.

Who Can Use Cold Sore Treatments?

Most over-the-counter cold sore creams and patches are suitable for adults and children aged 12 and over. However, suitability can vary depending on the specific product. Pregnant or breastfeeding individuals, those with weakened immune systems, or people taking other medications should seek guidance before starting any cold sore treatment. Children under 12, and anyone with an allergy to antiviral ingredients, should speak to a pharmacist or GP before use to identify the best treatment for cold sores in their situation.

Why Choose Cold Sore Treatments from Cured Pharmacy?

Cured Pharmacy is a registered UK online pharmacy offering a carefully selected range of clinically recognised cold sore remedies for fast relief, including antiviral creams, cold sore patches, and prescription treatments. When you buy cold sore cream online through Cured Pharmacy, you benefit from swift dispatch, discreet packaging, and access to a qualified pharmacy team ready to answer your questions. Whether you are managing a first outbreak or looking to stock up ahead of known triggers, our team is here to help you choose the right product with confidence. If you experience any skin irritation, our skin care range includes soothing and protective products.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

What is the best treatment for cold sores in the UK?

The best treatment for cold sores depends on the severity and frequency of your outbreaks. Antiviral creams such as aciclovir are effective for mild cases, while antiviral tablets may be recommended for frequent outbreaks. Cold sore patches offer protection and concealment. Speak to a pharmacist for personalised advice.

Can I buy cold sore cream online without a prescription?

Yes, most cold sore creams and patches, including aciclovir cream, are available to buy without a prescription from a registered UK online pharmacy. Antiviral tablets for cold sores are prescription-only and require a consultation. Cured Pharmacy can help guide you to the right product.

How quickly should I start cold sore treatment?

You should start cold sore treatment as soon as you notice the first signs of an outbreak, such as tingling, itching, or redness. Beginning antiviral cream or tablets at this early stage can significantly reduce the duration and severity of the cold sore. Delaying treatment once blisters have fully formed reduces its effectiveness.

Where can I buy cold sore treatment online in the UK?

You can buy cold sore treatment online in the UK from Cured Pharmacy, a registered online pharmacy offering a range of creams, patches, and antiviral tablets. Products are dispatched quickly with discreet packaging. Our qualified pharmacy team is available to answer any questions before you purchase.

Are cold sore patches suitable for everyday use?

Yes, cold sore patches are designed for daytime wear and can be used throughout the healing process. They are transparent, discreet, and help protect the sore from bacteria and further irritation. Cold sore patches are available over the counter and are suitable for adults and children over 12 years.

Can cold sore antiviral tablets be purchased online in the UK?

Cold sore antiviral tablets such as aciclovir and valaciclovir are prescription-only medicines in the UK. You can obtain them through an online pharmacy like Cured Pharmacy following an appropriate consultation. A qualified prescriber will assess your suitability before issuing a prescription and dispensing your treatment.

Is it safe to use cold sore treatment during pregnancy?

Pregnant individuals should speak to a GP or pharmacist before using any cold sore treatment. Some antiviral creams may be used with caution, but antiviral tablets are generally not recommended during pregnancy without medical supervision. Always disclose your pregnancy when seeking advice from a healthcare professional.

How long does a cold sore usually last with treatment?

With prompt use of antiviral cold sore treatment, an outbreak typically lasts between 5 and 7 days, compared to up to 10 days without treatment. Cold sore creams and patches help speed up healing and reduce discomfort. Antiviral tablets may shorten outbreaks further in people with frequent recurrences.

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Clinical Leads

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Content last updated: 31 Mar 2025

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