Cold sores are contagious during all stages of the development and healing process, meaning you shouldnt kiss anyone, share eating utensils, have oral sex or engage in any other oral contact throughout the entire process of a cold sore developing and healing.

When can I kiss with a cold sore?

The Mayo Clinic notes that cold sores are most contagious when oozing blisters are present, but you can still transmit the virus even if there is no active sore. To be safe and protect those you love, refrain from kissing or sharing contaminated items until all signs of the cold sore are gone.

Can you brush your teeth with a cold sore?

Oral Care With Cold Sores When you have a cold sore, you may not feel like brushing your teeth. Its important to continue your regular oral hygiene routine, even when youre not feeling your best. Brushing twice a day and flossing once a day helps keep your teeth and gums healthy.