The Ordinary Glycolic Acid 7% Toning Solution is a toner that gained popularity over the years due to its low price point and uncanny ability to destroy skin discoloration. However, glycolic acid is not for everyone. Glycolic acid penetrates deeper than most alpha hydroxy acids and can cause irritation; other side effects include tingling, irritation, dryness, peeling, itching, and in some cases, post-inflammatory hyperpigmentation. So yeah, it didn’t work for...