The application of an egg white mask can clog the pores and increase the possibility of breakouts for those who have acne prone skin. Other side effects include the spread of bacteria on the skin, as raw egg whites contain salmonella, a bacterium that can cause food poisoning. Other side effects may include dry skin and general irritation, especially if additives such as pure lemon juice are used. Only your dermatologist can help you decide if the use of an egg white mask is right for you.