Top 10 Early Warning Signs of Skin Cancer – Insights by Dr Shaun Segal

Skin cancer is one of the most common cancers globally, and yet, many people don’t realize how silently it can develop. At my clinic, I often see patients who wish they had recognized the signs earlier because early detection can truly save lives.

I’m Dr Shaun Segal, and through my years of treating skin cancer, I’ve come to understand not just the science but the human stories behind this disease. I believe in empowering people with knowledge, and today, I’d like to walk you through the top 10 early warning signs of skin cancer—signs you should never ignore.

Whether you’re a sun-seeker, a regular outdoor worker, or simply someone concerned about a suspicious spot, I hope this article gives you clarity and the motivation to stay vigilant.

1. A New Growth That Doesn’t Go Away

One of the earliest signs of skin cancer is the appearance of a new lump or bump that wasn’t there before. It may look harmless at first—small, pink, red, or skin-colored—but if it sticks around for weeks or begins to grow, it deserves a closer look. These growths can be basal cell or squamous cell carcinomas, both of which are common forms of skin cancer.

Dr Shaun’s Insight:
“If a new bump doesn’t disappear in 4–6 weeks, especially on sun-exposed areas like your face or arms, it’s time to see your dermatologist.”

2. A Mole That Changes in Size, Shape, or Color

You’ve probably heard the advice to keep an eye on your moles—and for good reason. Melanoma, the most dangerous form of skin cancer, often begins in existing moles. If a mole grows, becomes irregular, or changes color (especially to darker shades), take it seriously.

Watch for the ABCDEs:

• Asymmetry
  
  
• Border irregularity
  
  
• Color changes
  
  
• Diameter over 6mm
  
  
• Evolving (changing in any way)
  
  

Dr Shaun’s Insight:
“Photograph your moles every few months. Comparing photos is often the clearest way to catch changes early.”

3. A Sore That Won’t Heal

Sometimes skin cancer disguises itself as a small sore or wound that just doesn’t heal. You might think it’s a shaving cut, pimple, or insect bite—but if it lingers for more than a few weeks or bleeds repeatedly, it’s not just skin-deep.

Dr Shaun’s Insight:
“If your skin is stuck in a cycle of healing and reopening in the same spot, that’s a red flag.”

4. Itching or Tenderness on a Spot

Not all dangerous lesions are visible. Sometimes, you’ll notice a mole or patch of skin that starts to itch, burn, or feel tender. This subtle discomfort can be an early warning sign, especially in melanomas.

Dr Shaun’s Insight:
“Pain is your body’s way of waving a red flag. Even a tiny, itchy bump could be significant.”

5. A Shiny or Pearly-Looking Bump

Basal cell carcinoma often presents as a smooth, shiny bump—almost like a translucent pearl on the skin. These are most common on sun-exposed areas like the nose, scalp, or chest.

Dr Shaun’s Insight:
“Don’t mistake these shiny bumps for harmless pimples. They don’t go away, and they slowly grow over time.”

Also Read:- Common Myths About Skin Cancer – Debunked by Dr. Shaun Segal

6. Scaly Red Patches or Rough Spots

If you’ve got a patch of dry, scaly skin that doesn’t respond to moisturizers or topical treatments, it could be more than eczema. Actinic keratosis (a precursor to squamous cell carcinoma) often starts this way.

Dr Shaun’s Insight:
“Chronic sun damage can leave a visible mark. If your skin feels like sandpaper in a spot, get it checked.”

7. Dark Streaks Under Nails

A dark vertical line under your fingernail or toenail might seem harmless, especially if you think you bumped it. But in rare cases, it could be a sign of subungual melanoma.

Dr Shaun’s Insight:
“Nail melanoma is uncommon but dangerous. If a line appears out of nowhere, especially without trauma, see a doctor.”

8. Pigmented Spots with Irregular Borders

Moles or lesions with multiple colors—brown, black, red, white, or blue—are concerning. Uneven coloration and irregular borders are strong indicators of melanoma.

Dr Shaun’s Insight:
“Uniform color is usually safe. Uneven tones signal trouble.”

9. Bleeding or Crusting Spots

A spot that bleeds with light touch, crusts over, and re-bleeds is suspicious. Even without pain, bleeding without cause is never normal.

Dr Shaun’s Insight:
“Don’t ignore bleeding lesions, especially if they’re persistent. Skin cancer isn’t always painful—but it is progressive.”

Recommended Reading: Why Annual Skin Checks with a Skin Cancer Doctor Are More Important Than Ever in 2025

10. A Spot That Just Feels ‘Off’

Sometimes, your instincts know best. Many of my patients come in saying something like, “This spot just feels different than the rest of my skin.” Trust that gut feeling.

Dr Shaun’s Insight:
“You know your skin better than anyone. If something seems strange—even if it doesn’t check all the boxes—let a professional take a look.”

Final Thoughts: Be Proactive, Not Fearful

Spotting these signs doesn’t necessarily mean you have skin cancer. But ignoring them is a risk you don’t need to take. The earlier we catch it, the easier it is to treat, often with minimal procedures and full recovery.

Here’s what I recommend:

• Perform monthly self-skin exams under good lighting.
  
  
• Photograph moles and track any changes.
  
  
• Wear sunscreen daily, even on cloudy days.
  
  
• Book an annual skin check with a certified dermatologist—especially if you have fair skin, a history of sunburns, or a family history of skin cancer.
  
  

I’m Dr Shaun Segal, and I firmly believe that awareness is your strongest defense. Let’s work together to keep your skin healthy, safe, and thriving. If you notice any of these signs—or just need peace of mind—don’t hesitate to reach out.