Most people who walk into our offices know they should be wearing sunscreen. And a lot of them actually do. They've got SPF 50 on the bathroom shelf, they apply it before heading out, and they genuinely feel like they've done their job. Then we see them under our lights, and there it is — a line of unprotected skin on the back of the hand, a chronically burned ear, a neck that's been quietly aging for years.
Applying sunscreen is a habit. Missing certain spots is also a habit. And in South Florida, where the sun is strong year-round and outdoor time is basically unavoidable, those missed patches add up to real damage over real time.
Here are the spots we see most often — the ones that get overlooked even by people who are genuinely trying.
This is one of the most commonly missed areas we see, and it's also one of the more dangerous ones. The tops of the ears, the rims, the area just behind the ear — all of it gets sun exposure that almost nobody thinks to protect. Hair might cover part of it, but it doesn't cover all of it, and thinner hair offers essentially no protection from UV rays.
We've written before about how exposed ears and the neck are among South Florida's most sunburned skin zones. Skin cancer on the ear is not rare. Squamous cell carcinoma shows up there more than patients expect, and because people aren't checking or protecting that area, it often goes unnoticed longer than it should.
Tip: After you apply sunscreen to your face, use whatever's left on your fingertips to cover the rim and back of each ear. It takes three seconds.
Lips have almost no melanin. They're thin-skinned, constantly exposed, and almost never get sunscreen applied to them. Most people think lip balm with SPF covers this — but they often apply too little, and they don't reapply after eating, drinking, or talking all day.
Chronic sun exposure on the lips can lead to a condition called actinic cheilitis — a precancerous change that tends to show up as persistent dryness, scaling, or a slight color shift on the lower lip. If that sounds familiar, lip sun damage is something South Florida patients consistently underestimate. And we see it often.
Use an SPF lip balm with at least 30, and treat it like sunscreen — meaning reapply it throughout the day, not just once in the morning.
People are understandably nervous about putting sunscreen near their eyes, and that's fair — most formulas sting. But the eyelids are some of the thinnest skin on your body, and they're fully exposed every single day. Skin cancers on and around the eyelid account for a meaningful percentage of facial skin cancers, and they're often detected later because patients don't think to check there.
A few options that help: mineral sunscreens (zinc oxide and titanium dioxide) tend to be gentler around the eyes than chemical formulas. Sunglasses with UV protection add another layer. And a wide-brimmed hat blocks overhead sun that even well-applied sunscreen can't fully address.
If you have thinning hair, fine hair, or a part that runs along the top of your head, your scalp is getting real sun exposure. And most people either skip it entirely or assume their hair is doing the work.
We've covered this topic directly: scalp sunburn is more dangerous than most people assume, and melanoma on the scalp tends to be diagnosed later than melanomas elsewhere on the body, partly because patients can't see it easily and aren't thinking to look. Spray sunscreens or powder SPF formulas work well for the scalp without the greasiness of a lotion. A hat with a tight weave — UPF 50 if possible — is also a reliable option.
Hands are one of the clearest indicators of sun damage we see in the exam room. They're almost always exposed, almost never protected, and they show the effects of years of unguarded UV exposure — sun spots, texture changes, and sometimes lesions that need attention.
Most people apply sunscreen to the face and body and then wash their hands immediately after, removing everything they just put on. Or they apply it to the backs of the hands and then rub them together, distributing it to the palms where it's less needed.
The tops of the feet get overlooked for similar reasons — people either forget entirely or apply a quick swipe that skips the foot altogether. This is a common source of painful sunburns and cumulative damage, especially for anyone spending time at the beach or pool. Outdoor time is accelerating sun damage to hands and other exposed areas that sunscreen rarely reaches.
Most people get the front of the neck. They extend their face sunscreen down and consider it done. But the back of the neck is a completely different story — it points directly at the sky when you're walking, driving, or sitting outdoors, and it almost always gets skipped.
This is one of the areas we see the most accumulated sun damage over time. Poikiloderma of Civatte, a sun-induced discoloration pattern, often shows up on the neck and chest in patients who didn't realize how much exposure those areas were getting. South Florida necks often reveal early sun damage that patients had no idea was developing.
Apply sunscreen to the back of your neck every morning — especially if you wear your hair up, drive with the windows down, or spend any time outside.
This one seems obvious in retrospect, but it's consistently missed. People apply sunscreen before heading out and often stop at the knees. The lower legs — especially the shins — get constant sun exposure in shorts and skirts, and they tend to receive either a thin layer or nothing at all.
Melanoma on the lower legs is notably more common in women, and it's one of the areas where later detection happens most frequently. Making the lower legs part of your regular sunscreen routine is a small habit change with meaningful long-term impact.
These are areas most people apply moisturizer and makeup to but not necessarily sunscreen. The skin here is delicate, the area sees plenty of sun, and it tends to be the first place UV-related aging and damage show up. If your regular sunscreen formula is too heavy or irritating around these areas, a lighter mineral formula applied gently with a fingertip can make a real difference without the irritation.
Sunscreen is the first and most important line of defense — but it's not the only tool. Niacinamide, a form of vitamin B3, has been studied in the context of skin cancer prevention, particularly for people with a history of actinic keratoses or non-melanoma skin cancers. Research, including studies on oral nicotinamide (the active form), has shown it can help reduce the rate of new non-melanoma skin cancers in high-risk individuals.
This is not a substitute for sunscreen or professional skin checks. But for patients in South Florida who have already had skin cancer, have multiple actinic keratoses, or are at higher risk due to years of sun exposure, niacinamide and nicotinamide for skin cancer prevention are worth asking a dermatologist about. It's a conversation that doesn't happen as often as it should.
Topical niacinamide also helps repair the skin barrier, reduce hyperpigmentation from sun damage, and improve overall skin texture — making it a useful addition to any sun-protective skincare routine, especially here.
Even when people do apply sunscreen to all the right areas, they often use too little. The standard guideline is about one ounce — roughly a shot glass — for full body coverage. Most people use significantly less, which means the SPF they think they're getting isn't what they're actually getting.
Reapplication is the other issue. Sunscreen breaks down with sun exposure, sweating, and water contact. In South Florida heat and humidity, two hours is the outer limit, and realistically less if you're sweating heavily or spending time in the water. Sweat and sunscreen together create their own set of skin barrier challenges that compound throughout the day if you're not staying on top of reapplication.
If you're not sure whether your current sunscreen is working well for your skin type or South Florida conditions, there are real differences between formulas that matter depending on your skin.
Sunscreen is daily maintenance. A dermatologist is the annual checkpoint. Even people who are diligent about sun protection benefit from regular skin checks — because UV damage accumulates over years before it becomes visible, and some of the areas most prone to skin cancer are the hardest to monitor on your own.
If it's been more than a year since you've had a full-body skin exam, that's reason enough to schedule one. If you've noticed any changes to an existing spot, a new growth that wasn't there before, or something that just doesn't look quite right, don't wait. Dermatologists can detect invisible sun damage before patients notice anything — and early detection is the single biggest factor in successful treatment.
Dermatology Experts has offices in Miami, Parkland, and Tamarac, serving patients across Miami-Dade, Broward, and Palm Beach counties. Call any location to schedule a skin check or ask about sun protection strategies that fit your skin and your lifestyle.