9. Pearly or Waxy Bump
A pimple the doesn’t come to a head or changes sizes, keep an eye on it. If you develop a waxy bump under the skin or a bump has a sunken center, have a professional take a look at it.
A waxy or pale bump can be a basal cell carcinoma.
You may also see irregular blood vessels growing near the surface of the skin or have a tendency to bleed easily.