How to... Treat a cold sore at home

1 eat cool, soft foods where possible. 2 Use an antiseptic mouthwash if it hurts to brush your teeth.

3 Drink plenty of fluids to avoid dehydration.

4 Wash your hands with soap and water before and after applying cream.

5 Use sunblock lip balm (SPF 15 or above) if sunshine is the trigger.

6 take paracetamol or ibuprofen to ease the pain and swelling.