Checklist for Change: How to Perform a Skin Self-Exam This May

May is more than just the start of gardening season and the precursor to summer vacations; it is Skin Cancer Awareness Month. As we peel off the winter layers and spend more time under the sun’s intensifying rays, there is no better time to perform a "Checklist for Change."

Skin cancer is the most common cancer in the United States, but it is also one of the most preventable and treatable—if caught early. Your skin is your body’s largest organ, and unlike your heart or lungs, it tells its story on the surface. You just have to know how to read the chapters.

In this guide, we’ll walk through why self-exams matter, the "ABCDEs" of mole checking, and a step-by-step head-to-toe checklist to keep your skin healthy this year.

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Why the "Self-Exam" is Your Best Defense

While an annual visit to a dermatologist is non-negotiable, a lot can happen in 365 days. Professional screenings are a snapshot in time, but a monthly self-exam is a motion picture. You are the person most familiar with your body; you are the first responder who will notice a "new recruit" or a "shifty character" on your skin.

The Power of Early Detection

Statistics show that when melanoma—the deadliest form of skin cancer—is detected in its earliest stages, the five-year survival rate is about 99%. That number drops significantly if the cancer is allowed to reach the lymph nodes or distant organs. By spending just ten minutes once a month, you are effectively becoming an active participant in your own longevity.

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The ABCDE Rule: What Are You Looking For?

Before you start the physical exam, you need to know the "alphabet" of skin health. Dermatologists use the ABCDE method to identify potential melanomas. If a spot meets any of these criteria, it’s time to book an appointment.

Letter	Criteria	What it Means
A	Asymmetry	One half of the mole does not match the other half.
B	Border	The edges are ragged, blurred, notched, or irregular.
C	Color	The color is not uniform. Shades of tan, brown, or black (sometimes red/blue) are present.
D	Diameter	The spot is larger than 6mm (about the size of a pencil eraser).
E	Evolving	The mole is changing in size, shape, or color, or it starts to itch or bleed.

Pro-Tip: The "Ugly Duckling" Sign

Beyond the ABCDEs, look for the outlier. Most moles on your body will look similar to one another. If one spot looks, feels, or grows differently than all the others, it is the "Ugly Duckling" and deserves immediate attention.

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The Ultimate Step-by-Step Self-Exam Checklist

To do this right, you’ll need a well-lit room, a full-length mirror, a hand mirror, a comb, and perhaps a digital camera or phone to document anything suspicious.

1. The Face and Head

Don’t skip the "high-altitude" areas. Skin cancer frequently appears on the face, ears, and scalp because of constant sun exposure.

• Face: Examine your nose, lips, mouth, and ears (front and back).

• Scalp: Use a comb or a blow dryer on a cool setting to part your hair in sections. Use the hand mirror to see the back of your head and neck.

2. The Upper Body

• Hands: Check your palms and the backs of your hands. Don't forget between your fingers and under your fingernails (look for dark streaks).

• Arms: Scan your forearms, elbows, and all the way up to your underarms.

• Torso: Stand before the full-length mirror. Check your chest and abdomen. Women should check the undersides of their breasts.

3. The Back and Posterior

This is where most people miss spots because they are literally "out of sight, out of mind."

• The Back: Turn your back to the full-length mirror and use the hand mirror to inspect your neck, shoulders, upper back, and lower back.

• The Glutes: Check your buttocks and the backs of your thighs.

4. The Lower Body

• Legs: Sit down and check the front and sides of your legs.

• Feet: This is a high-risk area for certain types of melanoma. Check the tops of your feet, between your toes, and the soles. Skin cancer can hide in the arches or on the heels.

• Toenails: Just like the fingers, check for any discoloration under the nail bed.

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Documenting Your "Skin Map"

The first time you do this, you might feel overwhelmed by the number of freckles or "beauty marks" you have. This is normal. The goal of the May exam is to establish a baseline.

• Take Photos: Use your phone to take "bird's eye" photos of your back, chest, and legs. If you see a specific mole that looks slightly odd, take a close-up photo with a ruler next to it for scale.

• Keep a Journal: Note the date and the location of any spots you want to watch.

• Use an App: There are several dermatologically-backed apps that allow you to track moles over time and even use AI to flag high-risk changes (though these should never replace a doctor).

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Beyond the Mole: Other Signs of Skin Cancer

While we focus heavily on pigmented moles (melanoma), non-melanoma skin cancers like Basal Cell Carcinoma (BCC) and Squamous Cell Carcinoma (SCC) are actually more common. Look out for:

• A sore that heals and then returns.

• A scaly, crusty patch of skin that feels rough to the touch.

• A shiny, pearly bump that looks like a pimple but never goes away.

• A flat, flesh-colored or brown scar-like lesion.

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Modern Prevention: Your May Maintenance

Performing the exam is the "detective work," but prevention is the "bodyguard." As May brings higher UV indices, update your daily routine:

1. The "Two-Finger" Rule: For your face and neck, apply two full strips of sunscreen to your index and middle fingers. That is the amount required for actual SPF protection.

2. Check the Expiration: Sunscreen loses its potency. If that bottle in your cabinet is from two summers ago, toss it.

3. UPF Clothing: If you hate the greasy feeling of lotion, invest in UPF 50+ shirts and hats. They provide consistent protection that doesn't wash off with sweat.

4. The 10 AM - 4 PM Rule: Seek shade when the sun is at its zenith and UV radiation is most intense.

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When to See a Professional

If you find something on your checklist that triggers an "ABCDE" alarm or simply feels "off," do not wait.

Schedule an appointment with a board-certified dermatologist. When you call, specifically mention that you have found a "changing lesion" or a "suspicious mole." Clinics often prioritize these appointments over general cosmetic consultations.

What Happens at a Professional Exam?

A dermatologist will use a dermatoscope—a handheld magnifying tool with a polarized light—to look deep into the structure of the spot. If they are concerned, they will perform a quick "shave biopsy" under local anesthesia. It is a minor procedure that provides major peace of mind.

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Final Thoughts: Make It a Habit

Skin health isn't a "one and done" task. Think of your May skin exam as an annual reset—a time to clear out the "fog" of winter and get reacquainted with your body.

By following this checklist, you aren't just looking for cancer; you are practicing self-care in its truest form. You are taking ownership of your health, respecting the skin you’re in, and ensuring that you’ll be around to enjoy many more Mays to come.

This May, don't just change your wardrobe—check for change.