did u ever figure out what it was. I’ve been dealing with this for years. i have the exact same marks.
I am having a problem and I believe gnats also known as no-see-ums these things, Bite and Bite and Bite all you have to do to make a long story short look it up on YouTube they have ruined my life. They bite me in the growing. They bite me in the butt they bite in the lip, bite me in the face. They bite me about everywhere on the bottom of the feet. They bite you when you’re in the bathtub under the water they bite that’s all they do is bite bite bite bite.