In some cases, there may not be an apparent cause. If a person pinches a dermatofibroma, it will not push toward the surface of the skin. Instead, it will dimple inward on itself. This ...

Medically reviewed by Brendan Camp, MD The dermatofibroma pinch test is a simple way to tell if the bump on your skin is a mole or a benign (harmless) growth called a dermatofibroma. If you pinch a ...