Changes in your feet, such as a dark streak under a toenail, could sometimes signal an underlying health condition, according to Rachel Jones, pharmacy superintendent at Superdrug. While many foot problems are harmless, some persistent changes warrant a check with a healthcare professional.
Feet as health indicators
Jones said: "Your feet can reveal a surprising amount about your health. While dry skin or the occasional ache is usually nothing to worry about, persistent changes to your feet can sometimes be an early sign of an underlying health condition. The key is knowing what's normal for you and recognising when something changes."
Cold feet and circulation
Cold feet are not always caused by chilly weather. They can be due to poor circulation on a cold day, but if feet are consistently cold and accompanied by pain when walking, numbness, or changes in skin colour, it could indicate reduced circulation from peripheral arterial disease or an underactive thyroid. People with diabetes may also experience cold feet due to nerve damage or circulation problems.
Toenail changes and other signs
Jones noted that thickened, yellow, or brittle nails are often a treatable fungal infection, but changes in nail colour, shape, or texture can occasionally be linked to nutritional deficiencies or other conditions. She said: "A dark streak that appears without injury should always be assessed by a healthcare professional, as in rare cases it can be a sign of skin cancer under the nail."
Other signs include swollen feet or ankles that appear suddenly or affect only one foot, which could signal poor circulation, a blood clot, or heart, kidney, or liver problems. Persistent pins and needles or numbness may be associated with nerve damage, vitamin deficiencies, or neurological conditions. Deep, painful cracks in heels that do not heal, especially in people with diabetes, require advice. Pain around the base of the big toe could be a bunion, and persistently itchy or peeling skin between the toes could be athlete's foot.
Superdrug offers thyroid and diabetes tests and overall health blood tests for those with concerns.
