Nutrition
Managing Stress: National Stress Month 2022
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Cold Sores (HSV-1): Causes, Symptoms, Treatment and Prevention
Learn what causes cold sores (HSV-1), how they're treated, ways to reduce outbreaks and how L-Lysine supplementation may support overall wellness.
Molly Hunsinger
Mar 8, 2022
Cold Sores (HSV-1): Causes, Symptoms, Treatment and Prevention
Cold sores are extremely common, affecting millions of people worldwide. These small, fluid-filled blisters are caused by the herpes simplex virus type 1 (HSV-1) and often appear on or around the lips. Although cold sores usually resolve on their own, understanding what causes outbreaks and how to manage them may help reduce discomfort and recurrence.
What Are Cold Sores?
Cold sores, also called fever blisters, are caused by herpes simplex virus type 1 (HSV-1).
After the initial infection, the virus remains dormant in nearby nerve cells and may reactivate periodically throughout life. While some people never experience noticeable outbreaks, others develop recurring cold sores triggered by certain factors.
Cold sores are contagious, particularly when active blisters are present, although HSV-1 can sometimes spread even when no visible sores are present.
How Do You Get HSV-1?
HSV-1 is commonly spread through close personal contact, including:
- Kissing
- Sharing drinks or eating utensils
- Sharing lip balm or cosmetics
- Contact with saliva from an infected person
HSV-1 is closely related to HSV-2, the virus more commonly associated with genital herpes. Oral-to-genital transmission is possible through oral sexual contact.
What Triggers Cold Sore Outbreaks?
Common triggers include:
- Emotional stress
- Illness or fever
- Fatigue
- Sun exposure
- Hormonal changes
- Physical trauma to the lips
- A weakened immune system
Many people notice outbreaks occur during periods of increased physical or emotional stress.
Cold Sore Symptoms
Before a blister develops, many people experience:
- Tingling
- Burning
- Itching
- Tenderness
Within 24 to 48 hours, small fluid-filled blisters typically appear before breaking open, crusting over and healing.
Most cold sores heal within 7 to 14 days without scarring.
Cold Sores vs. Canker Sores
Although they may look similar, cold sores and canker sores are different conditions.
| Cold Sores | Canker Sores |
|---|---|
| Caused by HSV-1 | Not caused by a virus |
| Contagious | Not contagious |
| Usually appear on lips or outside the mouth | Usually occur inside the mouth |
| Begin as fluid-filled blisters | Begin as shallow ulcers |
How Are Cold Sores Treated?
There is currently no cure for HSV-1, but several treatments may help shorten outbreaks or reduce symptoms.
Treatment options may include:
- Prescription antiviral medications
- Over-the-counter cold sore creams
- Cold compresses
- Pain relievers when appropriate
- Avoiding spicy or acidic foods during active outbreaks
- Protecting lips from excessive sun exposure
People with frequent or severe outbreaks should discuss treatment options with their healthcare provider.
Can L-Lysine Help?
L-Lysine is an essential amino acid involved in protein production and numerous cellular processes.
Some research suggests that lysine supplementation may help reduce the frequency or duration of recurrent HSV-1 outbreaks in certain individuals, although study results have been mixed and more research is needed.
Lysine is believed to work by competing with another amino acid, arginine, which HSV-1 uses during viral replication.
Natural dietary sources of lysine include:
- Fish
- Chicken
- Eggs
- Dairy products
- Lean meats
- Legumes
Individuals considering lysine supplementation should speak with a healthcare provider to determine whether it is appropriate for their individual health needs.
Supporting Your Immune System
Because outbreaks are often associated with immune stress, maintaining overall wellness may help reduce common triggers.
Healthy lifestyle habits include:
- Getting adequate sleep
- Managing stress
- Eating a balanced diet
- Staying physically active
- Wearing SPF lip protection during prolonged sun exposure
While these habits cannot eliminate HSV-1, they may help support normal immune function.
TeleWellnessMD® Wellness Consultations
TeleWellnessMD® connects patients with licensed healthcare providers who evaluate each individual's health history and wellness goals. When clinically appropriate, providers may discuss nutritional support options, including L-Lysine supplementation, as part of an individualized wellness plan.
Any therapy is prescribed only when medically appropriate following provider evaluation.
Final Thoughts
Cold sores are a common viral condition caused by HSV-1. Although the virus remains in the body for life, many people successfully manage outbreaks through lifestyle measures, prescription medications when appropriate and individualized wellness strategies.
If you experience frequent or severe cold sores, consult a licensed healthcare provider to discuss the most appropriate treatment options.
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This content is for educational and informational purposes only and should not be interpreted as medical advice. TeleWellnessMD® is a technology platform that connects patients with licensed healthcare providers. TeleWellnessMD® does not practice medicine, provide medical advice, or dispense medications. All therapies require evaluation and approval by a licensed healthcare provider. Results may vary. Prescription required.