Hi , Thanks for posting your query on HealthcareMagic. Cold sores or gingivostomatitis is usually mild and self-limiting and so can be managed symptomatically. -Avoid touching the lesions. -Wash hands with soap and water immediately after touching the lesions, such as after applying medication. -Topical medications should be dabbed on rather than rubbed in, to minimise trauma. Choline salicylate gel for pain control of cold sores if pain occurs -Sunscreen may be useful if you think recurrences triggered by sunlight. -Topical antiviral agents should also be applied before going out in the sun . Acyclovir 5% ointment may be used Take care