Seborrheic keratosis is a common noncancerous skin growth that tends to appear more frequently as people age. Here are some key points about it:

1. Appearance:

   • Seborrheic keratoses are usually brown, black, or light tan.
   • They look waxy, scaly, and slightly raised.
   • These growths often appear on the face, neck, chest, or back.
   • Some can grow large, more than 1 inch (2.5 centimeters) across.
   • They may resemble they were “dripped” onto the skin by a candle.
   • Usually round or oval, they can develop as single growths or in clusters.

2. Symptoms:

   • Gradual growth over time.
   • Rough bumps with a “pasted on” appearance.
   • Varied sizes (from small to over 1 inch in diameter).
   • Varied colors (light tan to brown or black).
   • Itchiness may occur.

3. Treatment:

   • Seborrheic keratoses are harmless and not contagious.
   • They don’t necessarily need treatment unless they bother you.
   • Removal options include freezing, scraping, or burning if irritation occurs or for cosmetic reasons.

4. Causes and Risk Factors:

   • The exact cause is not fully understood.
   • Genetic factors likely play a role.
   • Risk increases with age, especially after 50.
   • Family history may contribute.