Definition
A welt is a raised, swollen mark on the skin, usually caused by a blow or impact. Think of it like the raised ridge you get after being snapped with a towel 🤕. It's typically red and can be painful or itchy. Unlike a bruise, which is caused by blood pooling under the skin, a welt is usually more superficial and disappears relatively quickly. It's a temporary reaction of the skin to physical trauma. A welt is like the skin yelling, 'Ouch!'