Earwax production is different in different races, and these differences have been traced to the ATP-cassette binding C11 gene. The "most problematic" of the earwax (the wet type) is in white and black people (1); these groups also tend to have the most persistent or severe kind of acne (Source: acne.org ethnicity page) Variations of this gene is also responsible for less sweat production.
I think I may be onto something here, but, then again, I may be wrong and grasping for straws. What do you think? Do you have oily skin and a lot of or bad earwax?
Update/add on: The ATP-cassette binding gene is heavily involved in the transportation of lipids, drugs, and other substances, according to the Wikipedia page of it. There's a lot there (a "big gene", if you will, so I suppose it could be involved with acne).
(1) Overfield, Theresa (1985). Biologic variation in health and illness: race, age, and sex differences. Menlo Park, Calif: Addison-Wesley, Nursing Division. p. 46. "Most common type in Whites and Blacks is dark brown and moist. Dry wax, most common in Orientals and Native Americans, is gray and dry. It is flaky and may form a thin mass that lies in the ear canal."
Edited by RenegadeLamp, 03 September 2011 - 08:44 PM.