Fluid-filled red bumps that occur on the back, between the shoulder blade area, could be one of two things. They could be body acne or cysts.
Your shoulder blades.
Risen bumps or boils are painful pus filled bumps that forum under the skin. They are treated with antibiotics. Risen bumps can form anywhere on the body.
Ingrown Hair
Rasp.
Toads are born with bumps called warts which are filled with poison.
Scabies
Cystic acne forms cysts, which could be the red bumps you experience. Cysts, specifically, are fluid or pus-filled cavities inside the bumps.
It's called blister (fluid-filled bumps)
Vesicular Exema
A Rasp (I had this same exact question for homework)
use a 3 or more blade razor with shaving cream! ♥
The cast of Speed Bumps - 2013 includes: Marcel Lee as Blade Ann Marie Lamphier as Esther Cat Menzies as Innocent Bystander