A new bump that grows quickly can be alarming—especially when it appears as a pink, dome-shaped lump with a hard plug in the center.
One possible explanation is a skin growth called a keratoacanthoma. However, a similar appearance can also occur with squamous cell carcinoma, a type of skin cancer. That is why this kind of lesion should never be diagnosed from a photo alone.
What Is a Keratoacanthoma?
A keratoacanthoma is a rapidly growing skin tumor that often looks like:
- A round, dome-shaped bump
- A pink, red, or skin-colored growth
- A firm lump
- A central crust or hard keratin plug
- A lesion that develops over several weeks
