Cold sore causes due to herpes simplex virus of type I. Recurring cold sore causes when infected person gets the virus in the system. Excess sunlight is also a reason.

Prevention of cold sore infection can be best done by avoiding the triggering factor. Other ways to control cold sore are using SPF 15 lotions, wearing sun block.

Natural cure for cold sore includes use of garlic clove for fast healing and relief. To treat cold sores, cold compress and putting fine salt on the blister.

To get rid of cold sores, yogurt is very effective as it also helps to prevent recurrence. Foods for cold sore treatment should not include peanuts and chocolates.