May is Skin Cancer Awareness Month—Learn How to Spot Melanoma Warning Signs

Editorial update: October 8, 2026.

Skin-cancer awareness includes noticing changes in your skin and seeking professional assessment. A self-check can help you notice a concerning spot, but it cannot diagnose melanoma.

Know the ABCDE warning signs

• Asymmetry: the two sides of a spot look different.
• Border: its edge is irregular or poorly defined.
• Color: the color varies within the spot.
• Diameter: many melanomas are larger than 6 millimeters when diagnosed, but smaller spots can also be melanoma.
• Evolving: a spot changes in size, shape or color, or looks different from your other spots.

Arrange a dermatologist appointment promptly for a new or changing spot, or one that itches or bleeds. Do not wait for a spot to meet every item in the ABCDE checklist. The American Academy of Dermatology’s warning-sign guide provides further examples.

Use several forms of sun protection

Use a broad-spectrum sunscreen with an SPF of at least 15 regularly and as directed, together with shade, protective clothing, a broad-brimmed hat and sunglasses. Limit time in strong midday sun. Sunscreen alone does not eliminate risk.

Follow the product’s Drug Facts directions. Apply generously before sun exposure and reapply at least every two hours. For swimming or sweating, choose a product labeled water resistant and follow its 40- or 80-minute directions and instructions after towel drying. No sunscreen is waterproof. Ask a healthcare professional before applying sunscreen to a child under six months.

Read the labeled SPF, broad-spectrum information and directions rather than looking for an FDA certification claim. These labeling terms have specific testing requirements; they are not a blanket FDA endorsement of a brand.

Learn more from the FDA’s sun-protection guidance. Discuss your individual skin-examination schedule and any concerning changes with a dermatologist.