What is the first treatment for cold sores?

Cold sores are clusters of blisters, usually around the lips, caused by herpes simplex virus. Tingling, burning, or itching may occur before blisters appear. Antiviral treatment works by limiting viral replication; it tends to be more useful when started during these early warning symptoms or soon after lesions begin. A clinician can help distinguish cold sores from impetigo, irritation, or another mouth-area problem.

Contact a GP or pharmacist promptly if you recognise your usual warning symptoms and need advice about antiviral treatment. Keep the area clean, avoid picking the crust, and wash your hands after touching it. Do not share lip products, drinks, towels, or utensils, and avoid kissing or oral sex until the sore has healed. A cool compress and simple pain relief may make eating or speaking more comfortable if suitable for you.

Seek urgent care for eye pain, eye redness, light sensitivity, or a sore near the eye. Arrange a GP consultation if the outbreak is unusually severe, spreads widely, keeps returning, does not improve, or occurs with a weakened immune system. Babies, pregnant people, and anyone with extensive facial lesions should receive individual medical advice promptly.

Would antiviral treatment help if I start it at the tingling stage? How can I tell a cold sore from another lip rash? Do my medicines or health conditions change the advice?