A callus is a hard, thickened patch of skin that develops due to repeated friction or pressure, most often on the palms of the hands or soles of the feet. It differs from a corn, which is an inward ...

1 Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai, China 2 Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai JiaoTong ...

Human skin acts as a substrate for an ecosystem of diverse life. Serving as our bodies’ physical barrier and largest organ, human skin is home to millions of bacteria, fungi, viruses, and microscopic ...