Dryness on parts of the face, such as the lips and eyes, can be a common cause of discomfort near death. A lip balm could keep this from getting worse. A damp cloth placed over closed eyes might relieve dryness. If the inside of the mouth seems dry, giving ice chips, if the person is conscious, or wiping the inside of the mouth with a damp cloth, cotton ball, or a specially-treated swab might help.