Top
10
Doctor insights on: How Long Are Cold Sores Contagious

Share
1

1
How long are cold sores contagious after taking valtrex (valacyclovir)?

How long are cold sores contagious after taking valtrex (valacyclovir)?

As long as sore is : ...Visible. Cold sores are contagious at all stages from the tingling stage to the weeping stage to the scabbing and healing stage. They are most contagious at the weeping stage when fluid comes out. Valtrex (valacyclovir) may shorten the duration of infection, but if the sores are still healing they are contagious. ...Read more

Dr. Heidi Fowler
1,016 doctors shared insights

Cold Sore (Definition)

Also referred to as fever blisters, cold sores are small, painful fluid-filled blisters that are usually found around the lips. Cold sores are generally caused by the herpes simplex virus 1 which is related to herpes simplex virus 2 that causes genital herpes. Cold sores are very contagious and can be spread by mouth to mouth contact. They can spread to the genitalia and cause genital ...Read more


4

4
Is it true that cold sores are contagious?

Is it true that cold sores are contagious?

Yes, very: Cold sores, are caused by the herpes virus, and appear initially as small clear bubbles on the lip, roof of the mouth, or the gum near the teeth. These vesicles rupture and leave small, painful ulcers. These are very catagious and you can spread them to other parts of your body. So don't touch the sore with your finger! use a cotton-tipped swab to touch it, if you must, and throw it away! ...Read more

See 2 more doctor answers
6

6
At what stage do cold sores become contagious?

At what stage do cold sores become contagious?

Herpes: Asymptomatic shedding is very real and one of the biggest reasons why it's possible for people with herpes to pass herpes virus on to a sexual partner without having any signs or symptoms. That's pretty much what asymptomatic means: you can't see or feel that the virus is present and active on the surface of the skin. Thus, the person with herpes is always contagious. ...Read more

See 1 more doctor answer
7

7
Are cold sores still contagious when they're gone?

Are cold sores still contagious when they're gone?

Not once the : Skin has fully healed. But they are contagious in all forms of the active lesion. ...Read more

8

8
How contagious are cold sores if they are open vs closed?

How contagious are cold sores if they are open vs closed?

No: They are most contagious when a scab cracks open and fluid oozes out. But, it is contagious through all phases. It is not contagious once the skin has healed. ...Read more

9

9
I think my boyfriend gave me cold sores. How contagious are they?

I think my boyfriend gave me cold sores. How contagious are they?

Unlikely: You probably got it from yourself, not your boyfriend. Most adults are already infected with hsv-1, which is typically acquired in childhood. But if this is truly your very first cold sore, then maybe you did get it from him. ...Read more

10

10
Are cold sores contagious only when they are open or all the time?

Are cold sores contagious only when they are open or all the time?

NO, unfortunately: They are contagious through all phases until the skin has healed. They are most contagious with an open & oozing sore. ...Read more

Contagious (Definition)

One is able to transmit an infection to another by ...Read more