Sometimes, the bite turns into a nasty bruise. Because the fly literally tears the skin, blood can leak into the surrounding tissue. You’ll see a purple or blue halo around the red welt. I had one on my calf that looked like I’d been shot with a paintball made of grape juice.
If you notice the bruise spreading or the swelling getting worse after 24 hours, don’t panic—just keep an eye on it. It’s usually just your body being dramatic.
The Aftermath: Blisters and Scabbing
A day or two later, the bite might develop a small, fluid-filled blister. This is normal, not a sign of infection. Think of it as your skin’s way of saying, “That was rude, and I’m going to complain by forming a tiny water balloon.” The blister will eventually dry up and form a scab, which will stick around for a week or more. Yes, it’s ugly.
Don’t pop the blister. Popping it is like opening the door to an infection party, and trust me, you don’t want that guest list.
Stages of Horse Fly Bite: Symptoms, Pictures, and Treatment
