Here's what I look like now. Note that I've gotten slightly redder. This is because I intentionally progressed from about one minute per day of unprotected solar exposure -- once I had mostly healed -- to about 10 minutes. I've been doing this in order to restore my just-barely-tan complexion. After I'm back to my normal skin tone, I'll start using SPF 50+ on my face daily. (I use it now, but only after I finish my unprotected exposure time. By the way, my exposure time measurements are quite rough, based on how long I think I've been walking outside, and what percentage of time I was actually in direct sunlight.)
Don't be confused by the red mark on my nose. When my nose itches, I tend to scratch it. I appear to have an amazing ability to slice it open with my fingernail. Oops!
After I've completely normalized, I may continue to expose other parts of my skin (not my face) to the sun for 10 or 20 minutes per day, in order to keep my vitamin D levels up. Or I may just wear sunscreen on all exposed skin, and instead supplement vitamin D3. Suffice to say that there is a lot of debate on how best to acquire vitamin D, in order to maintain bones and the immune system, and to suppress cancer. Furthermore, some studies suggest that sunscreens may actually promote skin cancer, as some of their chemical components turn carcinogenic as a result of ultraviolet radiation exposure, so I'm not particularly keen on slathering myself with the stuff. (I use Aveeno, which is the safest that I could find in this regard, based on current -- and frankly insufficient -- published research. I should qualify that: zinc oxide appears to be safer, if you don't mind looking like a pasty white ghost, as it doesn't vanish into the skin, although perhaps there is a risk of zinc poisoning.) I would strongly encourage you to Google around for vitamin D, sunscreen, and cancer.
To further complicate matters, ultraviolet light can often improve skin conditions, as with psoriasis. It also draws one's macrophages (white blood cells) into the skin's upper layers, increasing protection from invading pathogens. It combines with cholesterol to produce a source of vitamin D, which appears to suppress cancer (although studies are ongoing). In excess, of course, it causes wrinkles and skin cancer.
Incidentally, excessive solar exposure was the primary cause of my wrinkles and actinic keratoses. Now that they're basically gone, I'm going to be much stingier with my solar exposure time. But you have different genes and different skin issues, so I'm not going to pretend to be able to tell you what balance of solar exposure and sunscreen is best for you. Google for the research and decide for yourself. And don't assume that your dermatologist has all the answers. Read what cancer researchers have to say, as well.