Maybe: There are oil glands on the edges of the lips. That means one can get plugged oil glands and occasionally a pimple there. Plugged oil glands may come 1-3 at a time. After the stuff comes out, it should heal up fine. Herpes cold sores are often a cluster of 3-10 tiny bumps, and don't contain pus or oil. Cold sores break easily, can ooze a bit, as if the surface got scraped away, and they crust up.
Answered 9/26/2017
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