Sudden changes in the skin—such as new moles, dark spots, or scaly patches—can cause concern. While many of these changes are harmless, others may indicate the early stages of skin cancer, one of the most common yet most treatable cancers worldwide. Each year, over 1.5 million new cases are diagnosed, emphasizing the importance of early detection, especially for melanoma, the deadliest form of skin cancer.

There are three main types of skin cancer: Basal Cell Carcinoma (BCC), Squamous Cell Carcinoma (SCC), and Melanoma. BCC usually appears as a shiny bump, pink growth, or scaly patch and tends to grow slowly, rarely spreading to other parts of the body. SCC, in contrast, may appear as a crusty, red, or painful nodule that grows more rapidly and can spread if left untreated.

Melanoma is the most aggressive form of skin cancer and can develop anywhere on the body—even in areas not exposed to the sun. It often presents as a mole with irregular borders, uneven color, and a tendency to change over time. Because of its fast progression, recognizing the early signs of melanoma is essential for successful treatment and survival.

Doctors recommend following the ABCDE rule to identify possible melanomas: A for Asymmetry, B for Border irregularity, C for Color variation, D for Diameter larger than 6 millimeters, and E for Evolving—any mole that changes in size, shape, or color should be examined by a dermatologist. A fast-growing subtype known as nodular melanoma requires even more urgent attention due to its rapid development.

Monthly self-examinations using mirrors can greatly aid in early detection. Look for moles or spots that change, bleed, itch, or do not heal. Protect your skin by using broad-spectrum sunscreen with SPF 30 or higher, avoiding tanning beds, and wearing hats and long sleeves when outdoors.

Ultimately, early action saves lives. Detecting changes early and consulting a dermatologist promptly can make all the difference in preventing serious complications from skin cancer.