The term 'artery problem' can refer to two different issues. The first is a CLOT, which is a blockage of an artery caused by a blood CLOT. Clots can be dangerous and can lead to stroke or heart attack if not treated quickly. The second issue is a pothole, which is a depression in the arterial wall that can cause decreased blood flow and can lead to serious health problems. Both of these issues can be serious and require medical attention.