How to Perform a Skin Self-Exam for Skin Cancer

Cancer
Originally Published:
December 12, 2022
Updated:
April 18, 2025
Read Time:
3 min
Author:
BMG Staff
How to Perform a Skin Self-Exam for Skin Cancer

Skin cancer is the most common cancer in the United States, affecting nearly 1 in 5 people in their lifetime. Early detection is key—and a simple monthly skin self-exam can help you spot changes before they become serious.

Whether you’ve had sun damage, used tanning beds, or just want to protect your health, here’s how to perform a skin check at home and what signs to look for.

Why Self-Exams Matter

Many types of skin cancer develop slowly and are treatable when found early. A monthly skin self-exam can help you identify:

  • New growths or lesions
  • Moles that change in appearance
  • Spots that don’t heal or bleed easily

If you catch these signs early, your provider can recommend the right next steps—including biopsy or referral to a specialist.

How to Do a Skin Self-Exam

You’ll need:

  • A full-length mirror
  • A handheld mirror
  • Bright lighting

Follow these steps:

  1. Stand in front of the mirror and examine your face, neck, chest, and stomach. Women should lift breasts to check underneath.
  2. Raise your arms and check your underarms and both sides of your torso.
  3. Look at your hands, including your palms, backs, fingers, and under the nails.
  4. Sit down to check the front and back of your legs, top and bottom of your feet, and between your toes.
  5. Use a handheld mirror to check your back, buttocks, and genital area.
  6. Use both mirrors or ask someone to help you check your scalp. Use a comb or hair dryer to move hair aside.
Person performing a skin self-exam using a handheld mirror and full-length mirror to check hard-to-see areas for signs of skin cancer.
Regular skin self-exams can help you catch early signs of skin cancer—especially in hard-to-see areas like your back or scalp.

What to Look For: Signs of Skin Cancer

Skin cancers vary in appearance. They can look like moles, scaly patches, red bumps, or non-healing sores. They most often appear on sun-exposed areas like the face, arms, and neck—but can develop anywhere.

Common warning signs:

  • A new growth that’s changing in size, color, or texture
  • A sore that doesn’t heal after several weeks
  • A rough, scaly red patch that may crust or bleed
  • A mole that looks different from others (called the “ugly duckling” sign)
  • A wart-like growth
  • A mole with uneven borders or multiple colors

Use the ABCDEs of Melanoma

Check your moles for these key warning signs:

  • A – Asymmetry: One half doesn't match the other
  • B – Border: Irregular or blurred edges
  • C – Color: Multiple colors or uneven tones
  • D – Diameter: Larger than a pencil eraser (>6mm)
  • E – Evolving: Any change in size, shape, color, or elevation

If you notice any of these signs, contact your provider for an evaluation.

Tips for Effective Skin Checks

  • Perform self-exams once a month, ideally after a shower or bath
  • Take note of all birthmarks, moles, and spots
  • Use a ruler or take photos to monitor changes over time
  • Ask a partner or family member to help check hard-to-see areas
  • Report any itching, bleeding, or new pain in a skin spot to your doctor

When to See a Doctor

If you find anything suspicious during your self-exam—such as a new mole, changing growth, or sore that won’t heal—it’s time to see a provider. Early diagnosis can make a major difference in outcomes.

At BASS Medical Group, our Primary Care providers and cancer specialists offer comprehensive skin cancer screening, referrals, and care coordination.

Book a Skin Check with BASS Medical Group

Don’t wait to address suspicious spots or changing moles. Schedule a visit with a provider at BASS Medical Group in Walnut Creek or throughout the Bay Area to protect your skin and your overall health.

Request an appointment today

Medical Disclaimer: The information provided in this blog is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. BASS Medical Group does not endorse any specific tests, treatments, procedures, or opinions referenced in this content. Individual results may vary. Always consult with your physician or a qualified healthcare provider regarding any medical concerns or before making changes to your health regimen.