I have a rash on stomach, back, and shoulder. it's red bumps that are individual and not together. they are raised up and are now starting to itch.

See a doctor: Some itchy rashes are allergy, some viral, some bacterial - a doctor will probably be able to determine the general cause and prescribe or refer. Good luck.

Folliculitis: It sounds as though it could be a folliculitis which is an inflammation around the hair follicles. They're little red bumps which may or may not be itchy. Usually a salicylic acid or benzoyl peroxide wash will take care of it. It can also be a form of eczema which can be aggravated by salicylic acid or benzoyl peroxide. It's probably best to see a dermatologist.