VDerma Just take a walk on the traffic congested streets and you find your face with sweat, oil, and dirt. Bacteria may even accumulate on your dirty skin. Fortunately, there are things you can do to protect your skin from the skin and from dirt and grime. If you anticipate that you are going into the sun for a long time, be sure to use a good quality sun block. Wear a cap to provide additional shade for the exposed skin on your face and neck. As for dirt and grime, always carry face wipes with you to clean your face.