My dog is suddenly developing bumps all over his body, what's wrong?

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. I'm sorry to see that your dog is getting these bumps. Any bump or mass on a dog should be examined by a veterinarian in person. Your vet can perform an exam and a fine-needle aspirate of the mass - where he/she uses a needle and syringe to sample cells from the mass and look at them under a microscope. This way, your veterinarian can determine what type of mass that is and then recommend treatment. I hope this is helpful!