Written By Dr. Josh Zeichner for our content partner Men's Life Today -- Handpicked for you by our team.
- Sweat. Our faces sweat throughout the day, depositing salt and organic compounds (found in sweat) on your skin.
- Natural oils. Known as sebum, natural oils are also made by the body’s skin glands and collect on the surface of your skin.
- Dirt. Being exposed to the air and touching your face can cause dirt to be trapped on the skin.