Sun Exposure and Cold Sores: Why UV Light Can Trigger an Outbreak

Sun Exposure and Cold Sores: Why UV Light Can Trigger an Outbreak

A sunny day can be balm for the soul – but for many with HSV-1 (herpes simplex type 1), which often manifests as cold sores on the lips, too much sun can lead to something less pleasant: an outbreak.

But why is it that UV rays from the sun can reactivate the herpes virus? And what can you do to enjoy the sun without getting an outbreak? We'll dive into that here.

UV light and herpes: What happens to the skin?

When the skin is exposed to ultraviolet (UV) rays, it reacts by producing free radicals and inflammatory signals. At the same time, there is a temporary weakening of the immune system in the sun-exposed area because the body has to use energy to repair skin cells.

For people with latent herpes virus in the nerve cells around the mouth, this means that the virus can “wake up” and move to the skin surface, where it causes sores and blisters.

Who is particularly vulnerable?

You are at risk if you:

• Have had cold sores in the past
• Have fair skin and get sunburned easily
• Not using sunscreen on the lips
• Travel to areas with strong sun (e.g. ski holidays, tropical trips)

Many people experience their first outbreaks on or after sun vacations or ski trips, where the lips are exposed to intense UV exposure without protection.

How to protect yourself from sun-induced cold sores

1. Use lip balm with a high sun protection factor (SPF 30 or sunblock)

It is important that the lip balm is waterproof and broad-spectrum, so that both UVA and UVB rays are blocked.

2. Reapply often – especially at the beach, skiing and sports

Sweat, food and water remove sunscreen faster, so reapply every two hours or more often.

3. Wear a cap or wide-brimmed hat

Simple physical barriers can provide shade and reduce exposure of the face and lips.

4. Be extra careful if you have had previous outbreaks in the sun

If you have had a cold sore after sun exposure in the past, you are very likely to get it again with similar exposure.

5. Use preventive treatment during risk periods

Some people choose to take antiviral medication before and during vacations. Talk to your doctor if you often get sun-induced breakouts.

What if the outbreak is already underway?

If you feel tingling, burning or tension in your lip, it's time to react.
Many people in this situation are looking for a good herpes cream – and QUR's own herpes gel is a natural choice. It can halve both the extent and duration of an outbreak if used early in the process. QUR herpes gel also relieves pain/discomfort during an outbreak and helps the skin to heal faster.

Conclusion

The sun is beautiful – but for people with herpes, it can also be a hidden trigger. Fortunately, you can prevent sun-induced cold sores with the right protection, awareness and preparedness. With SPF on your lips and QUR herpes gel in your bag, you can enjoy both the beach and the snow with peace of mind.