Can Blue Dot Be Broken Capillary My Blue Pitbull Break Out With Red Dots And I Don't Know What To Do To Stop It.?

My blue pitbull break out with red dots and i don't know what to do to stop it.? - can blue dot be broken capillary

I took him to the vet and the vet gave him a shot and held for a week. After that came with oatmeal shampoo for sensitive skin, all 4 days of Oxymed tropiclean, I give benidryl, and even wash all of his reporting every two days with soap for sensitive baby wash. I'm out of ideas. I need help.