Potential side effects of skin care products can vary depending on the product and individual type of skin. In general, some common side effects may include redness or irritation, dryness, stinging or burning sensations, and allergic skin reactions. Keep in mind to always read the instructions on the product label before use and test a small amount of the product on a patch of skin before using it regularly. If any side effects are experienced, it is best to consult a dermatologist or skincare specialist for custom skincare routine and dermatological solutions.