The itching from a herpes outbreak comes from the virus irritating nerve endings in the skin, causing them to fire off itch and tingling signals even before sores fully form. You can reduce this discomfort with a combination of topical numbing agents, antiviral medication, and simple at-home strategies that keep sores clean, dry, and free from further irritation.
Why Herpes Causes Itching
Herpes simplex virus lives in nerve cells between outbreaks. When it reactivates, it travels along nerve fibers back to the skin surface, and those neurons begin firing unprovoked signals for both pain and itch. This is why you often feel tingling or itching before any visible sore appears. The itch can persist throughout the outbreak as the virus inflames surrounding tissue and the skin breaks down into blisters and ulcers.
Topical Numbing Agents
Lidocaine gel or ointment at 5% concentration is the most reliable way to numb herpes-related itching on contact. European clinical guidelines specifically recommend lidocaine for genital herpes, noting it’s a rare sensitizer and safe to apply directly to sores. You can find over-the-counter lidocaine products at most pharmacies. Apply a thin layer to the affected area as needed, up to three times daily.
For oral herpes (cold sores), docosanol 10% cream (sold as Abreva) offers modest but real itch relief. In a clinical trial of over 700 patients, those using docosanol experienced significantly faster cessation of itching, burning, and tingling compared to placebo. It works best when applied five times daily starting at the earliest sign of an outbreak.
Antiviral Medication
Prescription antivirals won’t eliminate itching on their own, but they shorten the outbreak that’s causing it. By slowing viral replication, these medications help sores heal faster and reduce the window of time you’re dealing with symptoms. The key is starting early, ideally during the tingling or itching phase before blisters appear. Your prescriber will typically have you continue the full course even if symptoms improve within a few days, because stopping early can allow the virus to rebound.
Saline Bathing and Warm Soaks
For genital herpes, one of the simplest and most widely recommended comfort measures is bathing the area in normal saline (salt water). European guidelines list saline bathing as a first-line supportive measure for both first episodes and recurrences. You can make a basic saline solution by dissolving about a teaspoon of table salt in a cup of warm water, then gently pouring or dabbing it over the sores.
A sitz bath can also help. Fill a shallow basin with warm water around 104°F (40°C) and soak for 15 to 20 minutes. Check the temperature carefully before sitting down, as broken skin burns more easily than intact skin. Pat the area completely dry with a clean towel or use a hair dryer on a cool setting afterward, since moisture trapped against open sores increases irritation.
Keep Sores Clean and Dry
Moisture and friction are two of the biggest drivers of ongoing itch during an outbreak. After washing or soaking, dry the area thoroughly. Between cleanings, a thin layer of petroleum jelly over the sores can reduce friction from clothing and protect raw skin from air exposure, both of which trigger itch signals. European guidelines recommend topical petroleum jelly as adequate supportive therapy for most recurrent outbreaks.
You may see suggestions online for applying cornstarch paste or baking soda to keep sores dry. A review of alternative herpes treatments published in the journal Viruses classified both of these as unproven and likely not beneficial. Stick with gentle washing, thorough drying, and petroleum jelly if you need a barrier.
Clothing Choices That Reduce Irritation
What you wear during a genital outbreak matters more than you might expect. Tight synthetic fabrics trap heat and moisture against sores, which worsens itching and slows healing. The Cleveland Clinic recommends 100% cotton underwear for anyone with recurrent vulvar or genital skin issues, because cotton breathes and wicks away moisture that feeds bacteria and yeast. A cotton crotch panel sewn into synthetic underwear isn’t enough, as the surrounding fabric still traps heat.
Loose boxer shorts or pajama pants increase airflow to the area and promote healing. During an active outbreak, skip thongs, tight jeans, and workout leggings when possible. If you need to exercise, change out of sweaty clothing immediately afterward and rinse the area with clean water.
Lemon Balm for Cold Sores
Lemon balm (Melissa officinalis) has a long history in folk medicine for treating herpes sores, and lab research offers some support. A study testing lemon balm extract against HSV-2 in cell cultures found it reduced viral damage by up to 60% at nontoxic concentrations. The extract appeared to interfere with viral activity after the virus had already entered cells, rather than blocking entry. Topical lemon balm creams and lip balms are available over the counter and may provide some soothing relief for oral herpes, though clinical trials in humans are still limited.
Why You Shouldn’t Scratch
Scratching herpes sores feels like the obvious response, but it creates real problems. Open blisters already expose raw tissue to bacteria on your hands and under your fingernails. In a study of herpes patients, Staphylococcus aureus was found colonizing sores within the first 48 hours in some cases, and the number of bacterial infections increased over the following week. While serious superinfections from scratching are uncommon, they can delay healing and leave more noticeable scarring.
There’s also the risk of spreading the virus to new areas on your own body. Touching an active sore and then rubbing your eyes, for example, can transfer herpes to the eye, which is a much more serious infection. Keep your hands away from sores as much as possible, and wash them thoroughly if you do make contact.
If the itch is unbearable, press a clean, cool washcloth against the area for a few seconds rather than scratching. This provides temporary nerve stimulation that can interrupt the itch signal without breaking the skin.