Yellowing of the soles of the feet can be caused by a variety of reasons and is not necessarily a sign of impaired liver function. The yellowing of the soles of the feet may be physiological and pathological. 1. Normal yellowing of the soles of the feet may be caused by long-term friction on the soles of the feet, resulting in thickening of the stratum corneum on the soles of the feet, causing the soles of the feet to turn yellow, and there may also be hardening and thickening of the soles of the feet. In addition, excessive intake of foods containing high levels of carotenoids may also cause yellowing of the soles of the feet. It can be relieved by exfoliating or stopping the intake of carotenoids. 2. Pathologic yellowing of the soles of the feet may be related to liver and gallbladder diseases, such as liver diseases, cholecystitis, gallstones and other diseases can lead to obstruction of the bile ducts, resulting in jaundice. However, jaundice can often be seen in the sclera and mucous membranes of the skin yellow, and is not limited to the soles of the feet. Also, foot odor can cause yellowing of the soles of the feet. There are many other causes of yellowing of the soles of the feet, it is recommended to go to a regular hospital to complete the examination, the doctor to clarify the cause of the disease, and standardized treatment to avoid delaying the condition.