How do i get rid of these itchy, red bumps all over my body?

Find the cause: Itchy red bumps can occur from multiple causes, you need to find out why you have them first, so see a doctor and let them look at them and determine what they may be.

Depends: If those itchy red bumps are red and look like welts, then they are likely hives and should respond to antihistamines such as claritin, (loratadine) allegra, zyrtec or clarinex. Antihistamines can decrease the itching. The next step is to try to identify the reason for the rash. An allergist or dermatologist can be of assistance here.