I have watched clots form on my skin. I usually squeeze pimples until they bleed, and I’m also accident prone.
When a pimple comes to a head, I take two cotton swabs and apply pressure to two sides of it until all the pus comes out. That is followed by a clear liquid, and then blood.
Once the blood surfaces, I have to blot the area with a tissue until it stops oozing. When the blood has become gooey and just sits there, I know the clot is forming.
I get scratches on my arms a lot from my new puppy, and sometimes, his sharp little teeth draw the blood out of me. By the time I have wiped the area with alcohol, the blood is already starting to clot. In a few hours, it dries out to form a scab.