What is Camphor?
Camphor is an active ingredient. A cooling, mildly medicinal ingredient rated 2/5 on both axes.
Where Camphor shows up
You'll most often find Camphor in targeted treatment products. Separately from clogging, its irritancy is rated 2/5 — low, so it's unlikely to sting or sensitise on its own.
Is Camphor bad for acne-prone skin?
That low score makes Camphor a reasonable choice even for acne-prone skin. As always, individual reactions vary, but it is not a likely cause of clogged pores.