This has been said over and over but I'll say it again. Lips do not produce sebum. They are mucous membranes and do not have natural sebaceous glands. The fordyce spots are mis-located sebaceous glands but are not there to moisturize lips. They are a malfunction of the body. They are harmless but very noticable IF you have E.C. Before E.C. they are not very noticable and much deeper. After E.C., when the top layer of skin is missing, they are very apparent.
Whether or not they contribute to the E.C. in some way I don't know. I just wanted to reinform about the sebum issue.
It is a scientific fact. The medical community agrees.