MOST LIKELY COLD SOR: The location and description is more suggestive of a cold sore.Having said that it is very difficult to say with certainty what it is without looking at it.If you are concerned about it get it checked by your doctor
Answered 11/28/2017
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Most likely acne: Given your history and the fact that the lip lesion has a white head this is most probably acne. Cold sores usually present on the lips during times of stress and appear more crusted almost like a common scab.
Answered 12/19/2014
3.4k views
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