What is the difference between a lip blister or cold sore?

Blister? / virus. Lip blister could be a burn, having bit your lip and have a salivary gland swolen or possibly some type of chemical burn causing a blister. A cold sore is typically a herpetic virus which will feel feverish, painful and last 10 days to 2 weeks usually.
No difference. Lip blisters and oral cold sores can both be caused by the same thing, either an apthous ulcer or a herpes virus infection. Apthous ulcers are from an unknown cause but commonly associated with stress. Herpes ulcers occur more commonly on the lips. Both tend to last 7-10 days, then resolve spontaneously.

Related Questions

What is the duration of a cold sore or a lip blister?

5-14 days. Cold sores can take 5-14 days to fully heal. Taking Valtrex (valacyclovir) (antiviral medication) can reduce the duration of cold sores if taken within the first couple of days from when they erupt. Read more...
About 2 weeks. Cold sores result from a re-activation of the herpes simplex virus-a common virus in up to 95% of the population. The lesion undergoes a series of changes over 14 days. Infected patients can infect others whether there is an active lesion or not. Anti-viral drugs based on Acyclovir are available by prescription and can be taken as a preventive med. Otc meds have variable success rates. Read more...
14 - 21 days. These flare ups can typically last 14 - 21 days. They are often viral in nature and can recur over and over again. Your doctor can recommend how to reduce the frequency and intensity with some medications. Read more...
2 weeks. They are cause by a virus. The normal time it takes your defense system to knock it out is two weeks. Anti-viral taken a the the first sign, , or pro-dermal stage, that tingling sensation, an anti-viral like abreva can help cut the two week process in half! Read more...

A cold sore is a single bump on your lip and a herpes blister are two totally different things right? Can a herpes 1 test tell the difference?

Not different and No. A regular cold sore on the lip is a regular herpes blister or herpes outbreak. They are the same thing. They are quite common in the world's population, and are usually caused by herpes type 1 virus (testing a cold sore for herpes type 1 is not necessary). Read more...