I’m in my 30s, and for the past year I’ve been getting the same painful blister on my lower lip every few months. It starts with a tingling, almost electric feeling, then quickly turns into a small cluster of fluid-filled bumps. They crust over after a few days, but each episode feels embarrassing, especially when it happens before work meetings.
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When the blister appears, how long does it usually take to form after you first feel the tingling?
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