Chilblains occur when cold causes the small blood vessels at the extremities and peripheral ends of the human body to constrict and spasm, resulting in venous congestion and poor local blood circulation. Therefore, soaking the affected area in hot water can dilate blood vessels, improve microcirculation, and increase blood flow, which helps in treating chilblains. Adding some traditional Chinese medicinal herbs like safflower, Angelica sinensis, Salvia miltiorrhiza, dried ginger, and aconite to the hot water, which are known for their properties of warming and invigorating the circulation of blood and dispelling cold, can enhance the effectiveness of the treatment.