Herpes labialis, commonly called cold sores, is caused by herpes simplex virus type 1 (HSV-1). After the first infection, the virus remains dormant in nerve cells and can reactivate later, causing recurrent blisters—usually around the lips.
Reactivation can be triggered by several factors. Common triggers include fever or another infection, emotional or physical stress, lack of sleep, excessive sun exposure and local trauma. However, sometimes an outbreak occurs without an obvious trigger.
A typical episode may begin with tingling, burning, itching or pain at the site, followed by small fluid-filled blisters. The blisters may rupture, crust and gradually heal.
If you experience frequent recurrences, it can be useful to identify your personal triggers. Lip sunscreen can be particularly helpful if sunlight appears to trigger outbreaks.
Antiviral treatment works best when started very early—ideally during the tingling or burning stage, before the blisters fully develop. Depending on the frequency and severity of episodes, your dermatologist may prescribe an oral antiviral medication.
For people with frequent, severe or particularly troublesome recurrences, suppressive antiviral therapy may be considered. The appropriate regimen depends on the individual and should be decided with your doctor.
During an active outbreak, avoid picking or touching the lesions. Wash your hands after accidental contact and avoid sharing lip products, towels or utensils. Avoid kissing or oral contact with others while active lesions are present, particularly with newborns and people who may be medically vulnerable.
If sores are unusually frequent, severe, persistent, involve the eyes, or occur in someone with reduced immunity, medical evaluation is important.
With appropriate early treatment and trigger management, recurrent herpes labialis can usually be controlled effectively, even though the virus itself remains dormant in the body.
For expert diagnosis and treatment of herpes labialis (cold sores), consult Dr Neha Athalye at DermcareMD Skin & Hair Clinic in Kothrud, Pune, offering evidence-based care for cold sores and recurrent lip infections. If you experience recurring blisters around the lips, timely dermatological consultation can help identify triggers, guide antiviral treatment, and reduce the risk of future outbreaks.
