Hi.
Thanks for writing to us..
As per your complain cold sores are caused due to
Herpes Virus 1 infection and it is a recurring infection and many a times recurring eruptions are seen in conditions when the body immunity is low,
hormonal changes, allergies, sunlight exposure, stress and other viral infections like
common cold..
Nothing to worry, consult an Infectious medicine specialist or a
Dermatologist and get evaluated and a long course of oral and topical anti-viral medicines like
Acyclovir, Valacyclovir can help decreasing the frequency of the outbreaks..
Along with it you should also avoid close contact with other individuals when there is an active outbreak because it is contagious infection..
Also keep your personal belongings like towels, napkin, glasses etc separate to prevent spread of infection to other..
Hope this helps..
Regards.