Could Retin-A products cause worsening hyperpigmentation?

Thank you for your question. Retin-A is a great anti-aging product, but it can be irritating for some skin types. If there's pigmentation present while you use this and it is causing further pigmentation, i recommend to discontinue the use immediately. Use sunscreen daily and discuss with your Dermatologist the options of introducing gentle products to treat the pigmentation without causing further irritation. 
I hope this helps.
Regards,
Sheetal Sapra, MD, FRCPC

Thank you for your question. Retinol or retinoid topical prescriptions have a common side effect of causing dryness, irritation, or redness. Such irritation can cause hyperpigmentation. Another side effect is photosensitivity where the skin is more sensitive to the sun and can burn easily. I highly recommend you consult with a board certified dermatologist to have your skin evaluated and to discuss treatment options that best suit your needs. Take care and good luck.