Black and white close-up of a flexed bicep muscle with a noticeable dent.

Why Do I Have a Dent in My Bicep? The Reasons For Muscle Indentations

So you’ve just noticed something weird while you’re flexing in the mirror, right? Instead of seeing a gun show, you see an odd dent in your bicep that wasn’t there before. It’s like your muscle deflated itself. But before you start googling “bicep dent” and read all kinds of rubbish spouted on Reddit and Quora,…