X Cleveland Clinic Educational website from one of the world's leading hospitals Consider changing your diet.
If the pore remains open, it becomes a blackhead; if it's completely blocked and closed, it turns into a whitehead.
This chemical will clear up the acne you have now, and keep it from coming back! The numbers in the parentheses 1, 2, 3 are clickable links to peer-reviewed scientific papers.
But some swear by it as a natural acne treatment.