Estimated reading time: 6 minutes
There’s a myth that follows Black patients into almost every dermatology visit: darker skin doesn’t get skin cancer. It’s not true, and believing it can cost lives. Add a second myth: That sunscreen isn’t necessary for darker skin tones, and you start to see how one of the enormous gaps in dermatology takes hold: Black patients have the lowest melanoma survival rate of any racial group in the United States.
But here’s one thing worth mentioning: the melanoma most likely to affect Black patients often has very little to do with the sun. Understanding that distinction (not just “wear sunscreen”), is what saves lives.
Table of contents
- Understanding Melanoma in Black Skin
- Why the Outcomes Are So Different
- Acral Lentiginous Melanoma: The Subtype Sunscreen Doesn’t Prevent
- Bob Marley’s Story
- So Is Sunscreen Still Worth Wearing?
- Early Detection & Warning Signs
- Find a Dermatologist Who Knows How to Read Your Skin
- Frequently Asked Questions
- Sources
Understanding Melanoma in Black Skin
Melanin provides natural defense against UV radiation, functioning like a built-in SPF of roughly 13. While this protection makes skin cancer less common in darker skin tones, melanoma in Black skin remains a critical health threat.
Doctors often diagnose melanoma in Black patients at advanced stages. Roughly 52% of Black patients receive a late-stage diagnosis, compared to just 16% of white patients.
Delayed detection directly drives survival disparities. The five-year melanoma survival rate drops to 70% for Black patients, compared to 94% for white patients, one of the widest gaps in oncology.
Why the Outcomes Are So Different
Melanoma isn’t inherently more aggressive in darker skin. Instead, two main factors drive the disparity: where tumors develop and where clinicians look.
Most public health campaigns focus on sun-linked melanomas on the back, chest, face, and arms. Consequently, patients monitor moles on sun-exposed skin, and doctors prioritize inspecting those same areas first.
In Black patients, melanoma more often shows up somewhere else entirely.
Acral Lentiginous Melanoma: The Subtype Sunscreen Doesn’t Prevent
The subtype responsible for a disproportionate share of melanoma in Black, Asian, and Hispanic patients is called acral lentiginous melanoma (ALM). It develops on the palms of the hands, the soles of the feet, under the fingernails and toenails, and, in a closely related form, on mucous membranes like the inside of the mouth or nose.
Here’s the part that matters most for prevention: research has not established a link between ALM and UV exposure. It’s genuinely difficult to sunburn the sole of a foot or the skin under a nail bed, and the genetic changes found in ALM tumors look different from the UV-driven mutations seen in sun-exposed melanomas. Some researchers believe repeated pressure, friction, or trauma to these areas may play a role instead, but the full cause still isn’t well understood.
In practice, that means sunscreen, no matter how diligently it’s applied, was never going to prevent this particular cancer. It forms in places sunscreen doesn’t reach, for reasons that have little to do with the sun.
Bob Marley’s Story
The reggae icon Bob Marley first noticed a dark spot under his big toenail in the mid-1970s and assumed it was an old soccer injury. By 1977, a biopsy confirmed acral lentiginous melanoma. Doctors recommended amputating the toe; Marley declined, citing his Rastafarian beliefs, and opted instead for a more limited procedure to remove the nail bed and surrounding tissue. The cancer eventually spread to his lungs, liver, and brain, and he died in 1981 at age 36.
So Is Sunscreen Still Worth Wearing?
Yes, just not as protection against ALM. The American Academy of Dermatology continues to recommend daily broad-spectrum SPF 30+ sunscreen for every skin tone, for reasons that hold up independent of the ALM question.
Where Sunscreen Helps
- Basal Cell & Squamous Cell Carcinomas: UV radiation causes these non-melanoma skin cancers. Doctors often diagnose Black patients at later stages, making daily prevention critical.
- UV-Driven Melanomas: While less common in Black skin, UV-related melanomas can still happen on sun-exposed areas.
- Skin Health & Hyperpigmentation: It prevents dark spots, melasma, and photoaging from worsening due to UV rays.
What Sunscreen DOES NOT Protect Against
- Acral Lentiginous Melanoma (ALM): This is the most common subtype of melanoma in Black, Asian, and Hispanic patients.
- Why Sunscreen Cannot Prevent ALM: ALM develops on areas untouched by the sun, such as palms, soles, and nail beds. UV light does not trigger ALM, so broad-spectrum SPF cannot prevent it.
Early Detection & Warning Signs
Because ALM doesn’t announce itself through sun damage, catching it early depends on checking the places most people never think to look:
- A new or changing dark streak or band under a fingernail or toenail, especially one that’s wide, irregular, or spreading into the surrounding skin
- A dark spot or sore on the palm or sole that doesn’t heal, changes shape, or looks different from a callus or bruise
- An unusual pigmented patch inside the mouth or nose
- Any mole elsewhere on the body that’s changing in size, shape, or color. Follow the standard ABCDE warning signs (Asymmetry, Border irregularity, Color variation, Diameter over 6mm, Evolving) still apply.
A once-a-year full-body skin exam that includes the palms, soles, nail beds, and scalp catches far more than a mirror check ever will.
Find a Dermatologist Who Knows How to Read Your Skin
Dr. Nneamaka Ukatu treats patients at UCF Health’s Lake Nona location with specific training in how skin conditions, including cancer, present across darker skin tones. That expertise closes exactly the gap this article describes: knowing where to look, what a warning sign actually looks like on melanin-rich skin, and when a spot that “doesn’t look like textbook melanoma” still needs a biopsy.
- English
Frequently Asked Questions
Not meaningfully. That area isn’t exposed to UV light the way sun-exposed skin is, sunscreen isn’t practically applied there, and the melanoma subtype that develops in nail beds isn’t primarily caused by sun exposure in the first place. What actually helps is checking nail beds regularly for a new or changing dark streak and having it evaluated promptly if you find o
Melanin does reduce UV-related skin damage, which is part of why melanoma is less common overall in Black patients. But the melanoma subtype most likely to affect Black patients, acral lentiginous melanoma, isn’t the type melanin protects against, and it’s frequently caught later because it develops in places patients and clinicians don’t automatically check.
Yes. It still protects against basal cell and squamous cell carcinoma, helps prevent hyperpigmentation and other pigmentary changes, and reduces sun damage. These are all real benefits for skin of color, independent of the ALM question.
A new or changing dark line under a nail, a persistent dark spot or sore on the palm or sole, an unusual pigmented area inside the mouth, or any mole showing the ABCDE changes: asymmetry, irregular borders, color variation, growth, and an evolving appearance.
This article is for general educational purposes and isn’t a substitute for professional medical evaluation. If you notice a new or changing spot anywhere on your skin, nails, or mouth, schedule an exam with a dermatologist.
Sources
- American Cancer Society — Melanoma Skin Cancer Statistics
- American Cancer Society — Study: Lack of Education About Melanoma May Contribute to Black-White Survival Disparities
- American Academy of Dermatology — Statement on the Importance of Sun Protection
- The Skin Cancer Foundation — Bob Marley Should Not Have Died from Melanoma
- Melanoma Research Alliance / Cure Melanoma — UV Exposure & Risk of Cutaneous Melanoma in Skin of Color
- DermNet — Acral Lentiginous Melanoma
- PMC — Sunscreen Recommendations for Patients with Skin of Color in the Popular Press and in the Dermatology Clinic
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- dermatologist dermatology health skin skin cancer skin care summer tips sunscreen