What does tingling hands and feet mean? is it chemical or neural?

A nerve problem: This can occur from a systemic disease such as diabetes, a nerve impingment issue from the spine or from a side effect of certain treatments like radiation therapy. The exact reason it happens in diabetes is up for debate.

Usually neural: If you have been around chemicals, they may be the cause. Usually diabetics get neuropathy. Excessive alcohol use, chemotherapy certain drugs, back problems can also cause numbness. Sometimes the cause can not be determined.