Frequently asked questions

A cold sore is the consequence of an infection by the Herpes simplex virus (HSV-1), which causes small blisters on or around the lips. Characteristic for cold sores is a tingling or burning feeling of the infected zone. A blister is formed which causes itching and visible inconveniences can occur for more than a week.

Cold sores can be highly infectious and can infect other parts of your body or another person. The virus can be transmitted from the beginning of the outbreak up and till healing. The transmission of the virus can occur by means of physical contact, but it can also be transmitted from infected objects, such as for instance a glass or a toothbrush.

General research has shown that 80% of the population is a carrier of the HSV-1 virus, and 20% of them regularly suffer from cold sores. Once one has been infected with this virus, it remains in the body for the rest of one’s life.

Cold sores are caused by an initial infection with the Herpes simplex virus (HSV-1). The main triggers of a cold sore outbreak can be due to external and internal causes.

Internal factors

• Fever
• Illness
• Menstruation
• Emotional stress
• Upset stomach or GI disturbance
• Allergic reactions, including reactions to food
• Minor infections
• Any disease that increases metabolism (e.g. diabetes, hyperthyroidism)
• Presence of a second virus (e.g., common cold, flu)
• Fatigue
• Factors that depress the immune system

External factors

• Windburn
• Ultraviolet radiation (sunshine, tanning booths)
• Chilling
• Excitement
• Drying of the lips
• Any physical injury
• Dental treatment

Day 1: Tingling (Prodome)
The patient has a burning feeling on or around the lips, nose or chin.

Day 1 – Day 2: Occurrence of blisters (Erythema + Papule)
The area turns red and painful. Clusters of small blisters form, which can grow into 1 large blister.

Day 2 – Day 3: Bursting of the blisters (Vesicles)
This is the most infectious and most painful phase. The blisters burst.

Day 3 – Day 8: Formation of a crust
The crust forms on the small wound. If the crust falls off too soon, then this can lead to bleeding and can cause a burning sensation.

Day 8 – Day 10: Healing
The wound has healed and the fever blisters are gone.

Nowadays, there are numerous products on the market for combating cold sores. These products include creams, band-aids and pills. Many patients who have problems with cold sores do not use anything, undergoing a painful cycle because they are not satisfied with the current offer of products obtainable from doctors, pharmacies or drugstores. This is why Karo Healthcare developed its revolutionary product: Herpatch Cold Sore Serum, the easy and discrete way of making an end to the unpleasantness that comes with cold sores. 

The 15 advantages make of Herpatch Cold Sore Serum the treatment of choice, helping to heal cold sores quickly and without pain.

Herpatch Cold Sore Serum helps to treat cold sores throughout their entire cycle. When first applied a tingling feeling is felt on the lips, the application of Herpatch Cold Sore Serum can even help to prevent the occurrence of cold sores!

1. Before use, wash or rinse the affected area.
2. Make sure your hands are clean and dry.
3. Gently apply a small amount of the film forming serum on the cold sore so that it adequately covers all lesions and a margin of healthy skin surrounding them. After a few minutes the white serum forms a protective and transparent film over the cold sore. The serum can be reapplied, if necessary, every 3-4 hours until the cold sore is completely healed. The film can be removed, if necessary, with warm water.
4. You can use Herpatch Cold Sore Serum at any stage of the outbreak. However, we suggest applying it at first sign of an outbreak.

No, this is not necessary because Herpatch Cold Sore Serum itself has active properties and treats every stage of a cold sore outbreak so no need to rub extra acyclovir cream on it.

If you are pregnant or breast feeding, please consult a healthcare professional before using.

From the age of 4 Herpatch Cold Sore Serum can be used with children under the supervision of an adult. Under the age of 4 please consult your doctor.

You can use Herpatch Cold Sore Serum during each stage of the cold sore cycle from tingling to healing. However, we suggest applying it at first sign of an outbreak. The serum can be reapplied, if necessary, every 3-4 hours until the cold sore is completely healed.

The film can be removed, if necessary, with warm water.

Use Herpatch Cold Sore Serum on your cold sore or the area where you feel the tingling of a cold sore outbreak. This can be on your lips or around your mouth. Do not use inside the mouth, on mucous membranes or for genital Herpes.

Yes. You just need to wait a few minutes until the cream becomes a patch before you can apply your lipstick over Herpatch Cold Sore Serum.

In contrast to a typical acyclovir cream, Herpatch Cold Sore Serum forms a protective and transparent film over the blister. The film forming serum, loaded with active properties, creates an ideal micro-environment and helps to speed up the healing process.

Herpatch Cold Sore Serum will treat every stage of the outbreak, from the tingling to the healing phase, while acyclovir creams only have an effect during the first stage of the outbreak (tingling phase).

The benefits are numerous. Herpatch Cold Sore Serum fastens the healing of your cold sore, prevents the itching and burning, takes away the redness and swelling, prevents scabbing and reduces the blistering.

Because of these reasons, Herpatch Cold Sore Serum is highly effective.