Cold Sores: natural remedies and the evidence behind them
Cold sores are caused by the herpes simplex virus (HSV-1), producing painful blisters around the lips that can recur with stress, sun exposure, or immune…
7 options2 graded B5 traditional or ungraded
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Healed sores as fast as acyclovir in a large trial
Why it may be relevant
With a sore already present, propolis lip cream is applied straight to the lesion; in a large double-blind trial a 0.5% propolis cream healed active cold sores at least as quickly as prescription acyclovir cream.
Propolis is a bee-made resin rich in flavonoids with antimicrobial and anti-inflammatory activity. In an on-condition trial it eased pain, burning, and itching and shortened the time for lesions to crust over.
Dose or use Apply a thin layer of propolis ointment or balm to the sore several times daily.
Key study Randomized Controlled Trial (2019, PMID 30406509): Lip creams with propolis special extract GH 2002 0.5% versus aciclovir 5.0% for herpes labialis (vesicular stage). In 397 patients, the propolis cream reached healing in a median 3 days versus 4 days for acyclovir, with significant benefit for pain, burning, and itching; skin reactions can occur.
EvidenceSupported by smaller clinical studies · Recognised traditional useTime to resultsOften a few days when started at the blister (vesicular) stage; individual results varyTraditional useRecognised traditional use
Caution: Skip it if you are allergic to bees, honey, or bee products; patch test first as propolis can cause skin reactions.
Evidence grade not assigned · Traditional use recognised
Traditional topical herb for cold sores
Why it may be relevant
Since you have a sore flaring now, lemon balm is one of the most established herbal topicals for cold sores and is applied directly to the lesion to help calm it as it heals.
Lemon balm (Melissa officinalis) is a mint-family herb valued for antiviral and soothing properties, and applying it to an active sore is a long-standing traditional approach.
Dose or use Dab a lemon balm cream or diluted extract onto the sore a few times a day; start as early as you can.
Key study Traditionally used as a topical for cold sores; this specific use has not been confirmed here with a cited controlled clinical trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsOver the days of a typical outbreakTraditional useRecognised traditional use
Caution: For external use only; do a small patch test first, as mint-family herbs can irritate sensitive skin.
Evidence grade not assigned · Traditional use long-standing
Diluted oil dabbed on at first tingle
Why it may be relevant
When you feel that early tingle or warning sign, tea tree oil is traditionally dabbed (well diluted) on the spot to try to calm things before a full sore forms.
Tea tree oil is an essential oil with antimicrobial properties that has long been used topically on the earliest signs of a cold sore.
Dose or use Dilute a drop in a carrier oil and dab on the tingling spot; never apply undiluted.
Key study Traditionally applied topically at the first signs of a cold sore; this specific use has not been confirmed here with a cited controlled clinical trial.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsBest used at the very first signs, within hoursTraditional useLong-standing traditional staple
Caution: Never swallow; always dilute, keep away from eyes, and patch test, as undiluted tea tree oil can burn skin.
If you have a sore right now, a topical olive leaf extract preparation was tested in one small randomized trial for active recurrent cold sores, so there is preliminary research on using it during an outbreak.
Olive leaf compounds are thought to have antiviral properties, and early research suggests a topical preparation may help ease the duration and discomfort of an active cold sore, though evidence is still limited.
Dose or use Follow product labeling; consult a healthcare practitioner.
Key study One small RCT (2024, PMID 39623211) evaluated a topical olive leaf extract emulgel for recurrent herpes labialis with preliminary positive results; findings have not yet been replicated.
EvidenceSupported by smaller clinical studiesTime to resultsIf it helps, possibly within days of an active outbreak; individual results vary
Caution: For external use only; discontinue if skin irritation develops.
Healed sores as fast as acyclovir in a large trial
Why it may be relevant
With a sore already present, propolis lip cream is applied straight to the lesion; in a large double-blind trial a 0.5% propolis cream healed active cold sores at least as quickly as prescription acyclovir cream.
Propolis is a bee-made resin rich in flavonoids with antimicrobial and anti-inflammatory activity. In an on-condition trial it eased pain, burning, and itching and shortened the time for lesions to crust over.
Dose or use Apply a thin layer of propolis ointment or balm to the sore several times daily.
Key study Randomized Controlled Trial (2019, PMID 30406509): Lip creams with propolis special extract GH 2002 0.5% versus aciclovir 5.0% for herpes labialis (vesicular stage). In 397 patients, the propolis cream reached healing in a median 3 days versus 4 days for acyclovir, with significant benefit for pain, burning, and itching; skin reactions can occur.
EvidenceSupported by smaller clinical studies · Recognised traditional useTime to resultsOften a few days when started at the blister (vesicular) stage; individual results varyTraditional useRecognised traditional use
Caution: Skip it if you are allergic to bees, honey, or bee products; patch test first as propolis can cause skin reactions.
Evidence grade not assigned · Traditional use recognised
Soothing gel to calm an active sore
Why it may be relevant
If a sore is flaring and feels sore or dry, aloe vera gel is a gentle topical you can apply to soothe the lesion while it heals.
Aloe vera is a well-known skin-soothing plant gel used to calm irritation and support healing of cold sores and other minor skin lesions.
Dose or use Apply a small amount of pure aloe vera gel to the sore a few times a day.
Key study Traditionally used as a soothing topical for cold sores; this specific use has not been confirmed here with a cited controlled clinical trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsComfort often within the outbreak; healing over several daysTraditional useRecognised traditional use
Caution: For external use only; stop if the area stings or reddens, which can signal sensitivity.
Evidence grade not assigned · Traditional use recognised
Traditional topical herb for cold sores
Why it may be relevant
Since you have a sore flaring now, lemon balm is one of the most established herbal topicals for cold sores and is applied directly to the lesion to help calm it as it heals.
Lemon balm (Melissa officinalis) is a mint-family herb valued for antiviral and soothing properties, and applying it to an active sore is a long-standing traditional approach.
Dose or use Dab a lemon balm cream or diluted extract onto the sore a few times a day; start as early as you can.
Key study Traditionally used as a topical for cold sores; this specific use has not been confirmed here with a cited controlled clinical trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsOver the days of a typical outbreakTraditional useRecognised traditional use
Caution: For external use only; do a small patch test first, as mint-family herbs can irritate sensitive skin.
Evidence grade not assigned · Traditional use recognised
Classic amino acid for fewer outbreaks
Why it may be relevant
If cold sores keep coming back, lysine is the best-known nutrient people take regularly to try to make outbreaks less frequent, rather than to treat one in the moment.
Lysine is an essential amino acid taken to shift the lysine-to-arginine balance the herpes virus relies on; it is the traditional go-to supplement for recurrent cold sores.
Dose or use Taken as a daily oral supplement for prevention; follow product labeling and consult a practitioner.
Key study Traditionally used to reduce how often cold sores recur; this specific use has not been confirmed here with a cited controlled clinical trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsPrevention-oriented; assess over weeks to monthsTraditional useRecognised traditional use
Caution: High doses may cause stomach upset; check with a practitioner if you have kidney issues or take other medications.
Evidence grade not assigned · Traditional use long-standing
Low lysine may mean more frequent flares
Why it may be relevant
If you get outbreaks often, it is worth knowing whether your lysine intake is low, since a lysine shortfall relative to arginine is linked with easier herpes reactivation.
Lysine is an essential amino acid you can only get from diet; a low-protein or unbalanced diet can leave you short, and correcting that is a sensible foundation for fewer outbreaks.
Dose or use Look at dietary protein and lysine-rich foods; a practitioner can help assess whether you are getting enough.
Key study The link between lysine status and cold-sore frequency is mechanistic and traditional; it has not been confirmed here with a cited controlled clinical trial.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsA background factor; addressed over weeks to monthsTraditional useLong-standing traditional staple
Caution: True lysine deficiency is uncommon; do not overhaul your diet or self-treat without guidance if you have other health conditions.
Evidence grades describe the strength of published research for Cold Sores, not a promise of results. A higher grade is not a personal recommendation. Nothing here is medical advice — talk to your clinician before starting anything, especially alongside prescription medication.
