My dermatologist had me strip down to my underwear while her nurse watched, then had me lie down on the examination table while she scanned my skin with a black light. The white spots on my well-tanned arms gave her no cause for concern; the moles on my extremities seemed normal. But then she took out a can of freon and sprayed an area on my left cheek bone.
“There was only one pre-cancerous area,” she announced. “It’s gone now.” She went on to explain that it wasn’t unusual for basal cells to form on the left side of the face because that is the unshaded side when we drive. After she told me to make an appointment for next year, she told me to get some sunblock and use it.
Now there is another test that I routinely get: my endocrinologist measures my Vitamin D levels. A few years ago, they were lower than they should be, so she urged me to start taking supplemental doses to bring them up. The main symptom that I felt was a sustained, moderate depression. Weeks after I began taking the extra gel tabs, I started feeling better. I also started wearing shorts when I walked so that a larger area of skin would be exposed to the sun.
We get our Vitamin D from two sources, primarily: fortified milk and the sun. Vitamin D production is our version of photosynthesis. This is why psychiatrists and other doctors recommend that we get enough sunlight. But the recommendation clashes with what the dermatologist wants of us. Too much sunlight gives us skin cancer.