A substance that helps soothe, soften, and increase moisture levels, especially in the skin. Emollients may be used in a lotion, cream, ointment, or gel to prevent or treat dry, rough, scaly, itchy skin and other skin problems, such as rashes or burns. They may also be used to help protect the skin against irritation. Emollients may also be given by mouth to prevent or treat constipation by moistening and softening the stool.