Basal cell carcinomas may develop from a flat area

Basal Cell Carcinoma |
showing only slight changes from normal skin. Basal cell carcinomas often appear as small, smooth, shiny, pale, or waxy lump (called a nodule). They may emerge so slowly that they go unnoticed as new growths.
Basal cell carcinomas rarely cause pain in the earliest stages, although they may bleed after a minor injury. They may then form a scab and heal. Because this crusting and healing can recur over months or years with little apparent growth, one may mistake the tumor for a sore or wound.