Detailed answer

If you experience irritation while using a skin brightener, the first step is to immediately stop using the product. Give your skin a break and allow it to recover. To determine the cause of irritation, perform a patch test by applying a small amount of the product on a small area of your skin, preferably on your forearm, and observe for any adverse reactions. If the patch test causes irritation again, it is best to avoid using the product altogether. If the irritation persists or becomes severe, it is advisable to consult a dermatologist or skincare professional for further guidance and appropriate treatment.