Hair Loss After Weight Loss or Surgery: What Causes It and How Long It Lasts Have you recently lost a lot of weight or had surgery, only to notice more hair falling out in the shower or on your pillow? If you live in San Jose or the Bay Area, you are not alone. Many people go through this, and it can feel scary—but it is often temporary. Let’s break it down in a simple way so you can understand what is happening to your body and your hair. Why Does Hair Loss Happen After Weig