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Ask an Expert
Jane Varner, M.D.
Palo Alto Medical Foundation
My son is in school all day, then jumps into a car to travel to an outdoor swim practice. He has about five minutes to get ready. If we apply sunscreen in the morning, is it still effective eight hours later? What sunscreens are best for his situation?
I'm SO glad that your family is remembering sunscreen! The most recent statistics from the Center for Disease Control (CDC) show that approximately 70,000 people in the United States are diagnosed with melanoma... continue reading about My son is in school all day, then jumps into a car to travel to an outdoor swim practice. He has about five minutes to get ready. If we apply sunscreen in the morning, is it still effective eight hours later? What sunscreens are best for his situation?
Susan Maayah, M.D.
Palo Alto Medical Foundation
I'm 53 and in menopause. Since perimenopause, my melasma has returned. I had it my 30s due to birth control pills. I'm using TriLuma and am fanatical about sunscreen. I'm Asian and dermatologists have told me laser or other procedures might worsen it.
Melasma is typically caused in women by exposure to estrogens. For this reason, any hormone replacement you are taking that contains estrogen can contribute, so I would refrain from using estrogens. Also, the h... continue reading about I'm 53 and in menopause. Since perimenopause, my melasma has returned. I had it my 30s due to birth control pills. I'm using TriLuma and am fanatical about sunscreen. I'm Asian and dermatologists have told me laser or other procedures might worsen it.