Why bottom of feet turn black when you take hot bath?

Answer 1

The bottom of the feet can turn black during a hot bath due to a combination of factors, including increased blood flow and the heat causing the dilation of blood vessels. This can lead to a temporary discoloration as the blood vessels expand and blood rushes to the area. Additionally, if the feet are in contact with a surface that has residual dirt or debris, this can also contribute to a darker appearance. In some cases, it may indicate underlying issues, so persistent discoloration should be evaluated by a healthcare professional.