Has anyone got advice on how to stop my friends 4 yearr old son licking his lips/around his mouth?, Its causing a horrible mark and looks awful, the doctor says its eczema caused from the licking but he won't stop, she has put E45 cream on just to try help it go away and he just ends up wiping it off so she thinks he would do same if she used a funny/bad tasting cream as a deterant, is there anything else she can do