Rash on my child small red bumps little patchs on neck arms hands torso legs

This : This is one of those situations where "a picture is worth a thousand words"--really needs to be seen by a medical professional. Eczema is common in children and can occur on trunk and extremities. Topical moisture with heavier, cream-type moisturizers is best for eczema. If it does not resolve, it may require topical prescription medication. But a quick "eyeball" visit will clarify the issue.

Need to see to ID: This rash would likely need to be examined and more history obtained to be able to provide you with useful input about the diagnosis or possible treatment.