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Doctor insights on: Open Cold Sore

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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


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I heard that if you have a cold sore and touch it and then touch an open wound that the wound will get infected. Is this true?

Yes: You may spread the virus into open skin areas by touching the cold sore. Please wash your hands and wear gloves if caring for someone with a cold sore as well. ...Read more

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If you have conracted herpes what are there any other symptoms that you may show if you dont get a cold sore with open lession and scab?

If you have conracted herpes what are there any other symptoms that you may show  if you dont get a cold sore with open lession and scab?

Variety: Symptoms may include fever, enlarged neck nodes and pain with eating or drinking. You may also experience other symptoms such as pain, itching, and tingling possibly in the area where the cold sore may appear. ...Read more

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My cold sore turned in to a cut on my lip and it keeps splitting open and bleeding. What can I do to make it heal?

My cold sore turned in to a cut on my lip and it keeps splitting open and bleeding. What can I do to make it heal?

Try this: If this does not help, then please see a dentist: try putting vitamin e on the cut. To do this you break open a gel cap and put the oily vitamin on the cut several times a day. If it does not go away, have it checked. ...Read more

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My boyfriend has a unbroken cold sore on his upper lip he performed oral sex on me am i in line of catching it or is that only when it's broken open?

My boyfriend has a unbroken cold sore on his upper lip he performed oral sex on me am i in line of catching it or is that only when it's broken open?

Yes: Herpes simplex is contagious especially when there is a sore or blister (regardless of whether it's open or not). Herpes is even contagious without having any visible lesions. There is viral shedding preceding appearance if a blister which can be passed on by contact usually with kissing. ...Read more

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What to do if I have this thing on the corner of my mouth and when I eat or yawn it tears open because I open my mouth too far. is it a cold sore?

Not necessarily: Cold sores are painful liquid filled blisters that can occur on the lips, roof of the mouth or the gums which are usually caused by the herpes simplex virus (HSV-1). Tingling &/or pain can herald the oncoming of cold sore 1 to 2 days prior to eruption. Your doctor can do a test to find out if you have the Herpes virus. ...Read more

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The corner of my lip is super dry and chapped. It hurts to open my mouth i think maybe it's a cold sore but i'm not sure. How do I make it go away?

The corner of my lip is super dry and chapped. It hurts to open my mouth i think maybe it's a cold sore but i'm not sure. How do I make it go away?

Angular Cheilitis: There is a condition called cheilitis where lesions develop in the corners of the mouth and they can be persistent. They can be from lip-licking, nutrient deficiencies, dry mouth etc. These can become subject to opportunistic infections. Using a topical antibiotic and discouraging harmful behaviors (lip licking) may help. ...Read more

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I have a cold sore that never broke open, is nearly healed. treated with valtrex, (valacyclovir) but I kissed someone/had oral sex. What is risk for partner?

I have a cold sore that never broke open, is nearly healed.  treated with valtrex, (valacyclovir) but I kissed someone/had oral sex. What is risk for partner?

Difficult to tell..: We cannot predict the probability of an infection with a sore. IF it was present even though was not opened if the virus is contained in it there is always a possibility of giving it to the other person. If what is left is just a scar then it means it is not actively contagious. ...Read more