 So neuropathy can be neurologic symptoms in the feet, burning, tingling, numbness. Sometimes it's very painful. Sometimes it's not. If there's profound numbness, then a patient's in danger of hurting themselves without knowing it. So typically these patients either have diabetes or there are a lot of causes. Alcohol can be a cause, vitamin deficiencies. But a lot of people just have idiopathic neuropathy, meaning we don't know why they have it.