Yes, some side effects from using topical vitamin C are skin discoloration, stinging, redness, and dryness. To reduce the risk of side effects, stick to vitamin C serums with a concentration no higher than 20%.
FYI: Pandia health does not sell vitamin c. Our doctors suggest prescription retinoids as first line treatment for acne. Vitamin C might help with hyperpigmentation, inflammation, and redness but it does NOT prevent acne and is not as good as prescription treatments.