I was watching a how the other day on extracting blackheads. As stated on the show, the difference between blackheads and whiteheads is:
It looks white when the gland is clogged and not exposed to air. It looks black when the gland is exposed to air.
I do not have white fordyce spots on my lower lip. I only had the yellow fordyce on upper lip, which were not clogged but were leaking a little oil.
If I had white, clogged fordyce spots on my lower lip, I would buy a blue light (for acne). It is categorized as phototherapy light. From what I read, I think it said to use it 2-3 times a week for 15 minutes. This light can penetrate to bacteria deeper down (like in fordyce's spots) to prevent pimple from forming. You would need to keep using the blue light every week, though. It is a safe, noninvasive way that might just work. I know dermatologists carry phototherapy light that has UV light in it, but the UV light ages your skin like sun exposure does. The blue light does not have UV light in it. I do not think as many dermatologists have the blue light at their office. I would want to buy my blue light ($100-$200) so I would not have to visit their office twice a week. But you could try searching for a dermatologist who has the blue light, then try it. If it works, you could buy your own blue light.