By Helena Vesty & Joseph Wilkes Three alarming red flag symptoms on your feet could be warning signs of a ‘silent killer’ disease, health experts have said. This lethal disease is often referred to as a silent killer due to its subtle signs that are difficult to detect early. However, early recognition could be life-saving. Cardiovascular disease claims nearly 18 million lives worldwide each year. Yet, some unlikely symptoms on the feet can signal its deadly presence. The American Academy of Dermatology (AAD) points out three major red flags for cardiovascular problems by examining the feet an…