Do not use on inflamed, irritated, sunburned, or damaged skin. Avoid direct sun exposure and use sun protection, both during and a week after using REVOX B77 JUST MANDELIC ACID 10% + HA. Individual intolerance to the product is possible. If discomfort occurs, cease using it. Before the first application, it is recommended to perform a sensitivity test. If no irritation is developed after 24 hours, the product is safe to use. If you feel a pricking or burning sensation, the product must be washed off immediately with plenty of water. If the burning sensation continues, seek medical advice.