Meet the Dermatologist: Why Sunscreen Is the Most Powerful Anti-Aging Tool You Have

This is the first post in Clinical Perspectives, a monthly series where Dr. Sewell answers the sun protection questions his patients actually ask, drawn from two decades in the exam room. No product pitch to start. Just what he sees, week after week, in the skin of people who protected themselves and the skin of people who did not.

Why Dermatology, and Why Skin Cancer Specifically

Dr. Sewell did not walk into medical school planning to become a dermatologist. He avoided the specialty for years, assuming it was more about cosmetics than medicine, until a friend pointed out how well his skills fit the field. Once he looked closer, he found a specialty built on real disease, especially skin cancer, that also rewarded the exact skill set he had: close attention to detail, steady hands, and a pattern eye for what is changing on someone's skin.

After his dermatology residency, he completed a one year fellowship in skin cancer surgery, training specifically in Mohs micrographic and reconstructive surgery. That is the technique used to remove skin cancer layer by layer while preserving as much healthy tissue as possible. It became the center of his practice, and it still is.

What Sun Damage Actually Looks Like Over Time

Most patients think of sun damage as a tan that fades. Dr. Sewell sees something different. Over years, that golden, even coloration shifts into a freckled, blotchy pattern, with large brown spots called lentigines and eventually rough, sandpaper-like patches and small red blotches. The color changes stop fading and become permanent stains in the skin.

The patients he sees with consistent, long-term sun protection almost never show this pattern. Their skin stays close to its birth color, with no staining and no tan lines. That, in his words, is the healthiest position anyone can be in.

The patients who have protected their skin for decades keep something close to their birth color. No staining, no tan lines. That is the healthiest position anyone can be in.Dr. Lindsay D. Sewell, MD MBA

The Patient Who Changed How He Talks About Sun Protection

Three months into his dermatology residency, Dr. Sewell examined a man with a bleeding, golf ball sized lump on his leg that had been there, by his own admission, for years. It turned out to be deeply invasive melanoma that had already spread to his lymph nodes, liver, lungs, spleen, and kidneys. The man told him he felt healthier than he had at 20. Three months later, he was dead.

Dr. Sewell has carried that case for over two decades. It is the reason he treats prevention and early detection as personal, not just statistical. Skin cancer does not always announce itself with pain or obvious symptoms. Sometimes it looks like a lump someone has been putting off getting checked for years.

That case has stayed with me for over twenty years. Skin cancer does not always come with pain or an obvious symptom to make you go get it checked.Dr. Lindsay D. Sewell, MD MBA

The Sunscreen Misconceptions He Corrects Every Week

Two myths come up constantly in his practice. The first is that sunscreen itself causes cancer. The second is that sunscreen does not work. Neither holds up. What is well established is that UV light causes cancer, and the ingredients in question have not been shown to carry anywhere near that risk.

When patients say sunscreen does not work for them, the real issue is almost always application. A pea sized amount does not cover an adult body. The actual figure is about seven teaspoons per full body application, reapplied every two hours outdoors, or every hour if swimming or sweating. Most people apply once in the morning and call it done for an 8 hour day, which is exactly the gap SolRX Waterblock lotions were built to close, with 8 hours of water resistance backed by lab testing instead of a single 2 hour window.

Most people are not using too little sunscreen because they do not care. They are using too little because nobody ever told them what enough actually looks like.Dr. Lindsay D. Sewell, MD MBA

Who Is Most at Risk, and Who Is Most Surprised by It

The concern Dr. Sewell sees most often in clinic is precancers and skin cancer, frequently in patients who came in for something else entirely. The age group that surprises him most is not teenagers or retirees. It is people in their 20s through 40s, who are otherwise health conscious, who still get into tanning beds or skip sunscreen because the payoff feels immediate and the risk feels distant.

His framing for that group is blunt: sun exposure without protection is shortening a fuse most people assume they have plenty of time on.

What a Good Day in the Clinic Looks Like

Dr. Sewell describes his best days as the ones where training and skill make a direct difference in someone's life, whether that is clearing a teenager's acne or removing a cancer before it spreads. He has also lived the other side of it. A pre-melanoma on his own skin was caught and treated because he knew what to look for. Physician, heal thyself, fulfilled literally.

Why He Partnered with SolRX

Dr. Sewell also holds an MBA from Indiana University, completed in 2020, and has used it to grow his own practice from a single location to five. That business background is part of why the SolRX partnership made sense to him. He was specific about what drew him in: a legitimate, US made sunscreen with real science behind its 8 hour water resistance claim, addressing the exact reapplication gap he corrects in patients every week.

Dr. Lindsay D. Sewell, MD MBA Board-Certified Dermatologist, Mohs Micrographic Surgeon

Dr. Sewell is a board-certified dermatologist and fellowship-trained Mohs micrographic surgeon at High Valley Dermatology in Idaho Falls, where his practice focuses on skin cancer treatment and prevention. A father of eight and lifelong outdoorsman, he writes Clinical Perspectives to bring the sun protection guidance he gives patients in the exam room to everyone else. Learn more about Dr. Sewell