For many older adults, those dark, rough, or waxy spots are seborrheic keratoses—benign skin growths that look alarming but are not cancer. They often appear after age 50, in shades of brown, black, or tan, and can seem as if they were glued onto the skin’s surface. Common on the neck, chest, back, and scalp, they may show up one by one or in clusters, sometimes growing large enough to catch on clothing or jewelry and become irritated.

What makes them so frightening is how closely they can resemble skin cancer, especially melanoma. The key differences lie in their usually uniform color and well-defined borders, unlike the irregular edges and multiple tones seen in many malignant lesions. Still, any spot that changes, bleeds, or looks suspicious deserves prompt medical evaluation. Understanding what these growths are—and are not—can replace fear with vigilance and relief.