If your grandpa has dark, waxy bumps on his neck that itch, the most likely explanation is seborrheic keratosis — a very common, non-cancerous skin growth that appears more often as people age. Here’s what that means and what you should know. What Those Dark, Waxy Bumps Usually AreSeborrheic keratoses are benign (non-cancerous) skin growths that frequently develop after age 50. They can appear suddenly or slowly over time. They typically: Look brown, black, or tan Have a waxy, scaly, or slightly raised surface Appear “stuck on” the skin Range from very small to over an inch wide Common areas...
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