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When irritation occurs, your sebaceous glands may go into survival mode and produce even more oil — resulting in more blackheads.

Other extraction methods include professional-grade metal or plastic tools. These purportedly work by removing clogged blackheads without scratching your skin. The keyword here though, is professional.
Dermatologists who have years of training sometimes use these tools. When placed into hands with limited experience, extraction tools can turn into a source for scratches, wounds, and even scars.