What shampoo can get rid of these red bumps (pimples?) on my scalp?

No way to know. Without a diagnosis cannot suggest therapy, and cannot make a diagnosis without seeing these lesions. See a dermatologist.

Related Questions

How do you get rid of scalp pimples and little red bumps there?

Folliculitis. This is folliculitis. You can try a antibacterial cleanser but usually prescription medication is needed. Make sure you avoid oil on the scalp as this can contribute to the condition. Read more...
I think it best to. be sure of the cause. These lesions need to be visualized & a history needs to be obtained in order to make an accurate diagnosis. Sometimes lab testing or biopsy is necessary. Read more...

I have red bumps on my face post acne. They are not painful and have been around for quite a while now. What are they? How do I get rid of them?

Hard to say. You need to see a dermatologist to know what these bumps are. They may be scars from your acneand sometimes injections with cortisone into the scars can help them. Read more...