When I visited dermat in my teenage for mild acne, she gave me tret directly without giving me precautions such as sunscreen and the amount. She just told me to use it at night. I used tret for months without sunscreen and moisturizer, my skin used to turn red and my cheeks felt hot whenever I stood in sunlight. It wrecked my skin barrier. On my next visit, when I explained that my skin is getting dry, she gave me acne moist moisturizer. That product sucks. It used to turn me in to a grease ball. Because of more oil production, my skin turned worse. As a naive teenager, I thought this was due to all the chemicals in product and stopped using it abruptly.