A styptic pencil is a tool used for targeting and cosmetically eliminating small cuts and nicks from shaving. The pencil work by applying some form of alum, usually aluminum sulfate, or titanium dioxide to the wound, which when introduced to the blood causes the vessels to contract which stops the bleed and removes the cut visually. The cut is still there but it doesn't bleed and isn't red since blood-flow to that particular area is constricted. Styptics tend to be more aggressive than alum blocks due to the difference in the active substance (aluminum sulfate vs. aluminum potassium sulfate).
Styptic pencils tend to hurt quite a bit when used, usually much more than the cut itself, but the pain fades away pretty quick and the pencil promotes healing. It also removes most itches and irritation if used as soon as you're done shaving.
My question is, will this make me break out at all? Has anyone had any experience with it?