You're not likely to pass cold sores from your face to your neck. Cold sores like to transfer from a wet place like the mouth to another wet place like the genitals or eyes. The rash on your neck could be a sweat rash or a bacterial infection.
Cold sores look like a blister.
As a rule, cold sores are not a rash, but a blister! A rash sounds like,"Hives".
If you mean that you have a rash on your abdomen that looks like cold sores, it could be shingles. See your health care provider for a diagnosis.
There really isn't a difference, sunblisters are just a prettier name for cold sores. If the blisters come with symptoms like itching, burning and or tingling symptoms then they could be cold sores or fever blisters. Cold sores can be triggered to break out when you're out in the sun for long periods of time.
Might help sooth the symptoms but the best thing for cold sores is either topical creams like abreva or antiviral medication.
There are antiviral medications that reduce the duration of herpes infections like chickenpox, cold sores, and genital herpes. These include valacyclovir and acyclovir.
Probably not the best thing to use on cold sores, specially if they are around the mouth. That may aggravate your sores. The safest thing to use is over the counter cold sore creams like abreva.
One can talk to their local pharmacist or personal doctor to learn how to get rid of cold sores fast. Many online sites like EHow, offer advice on this. One can also visit sites like Abreva, makers of cold sore medicine, for tips and ideas on how to get rid of cold sores fast.
You can take the chance if you like, but to be safe, don't do it. The virus that causes cold sores is very contagious when the sores are in evidence and for a period before they show. Best bet is to be cautious and don't chance spreading this painful affliction any more than you have to.
some people (like me) get cold sores when they're stressed. Cold sores are red, puffy bubble like bumps that have a virus in them. They most offend appear on your lips. (if you get a cold sore, and it is really puffy, DO NOT POP IT! this will spread the virus and you will have other cold sores! so leave it alone, and if you don't like it, you can buy medicine for it, I recommend Abreva, it works the best) You may get a little impatient or cranky. You may also get tired.
some people (like me) get cold sores when they're stressed. Cold sores are red, puffy bubble like bumps that have a virus in them. They most offend appear on your lips. (if you get a cold sore, and it is really puffy, DO NOT POP IT! this will spread the virus and you will have other cold sores! so leave it alone, and if you don't like it, you can buy medicine for it, I recommend Abreva, it works the best) You may get a little impatient or cranky. You may also get tired.
Just like with your face, you can get pimples on your back if pores get plugged up. It is also possible to get sores from poor hygiene.