Diabetes is a chronic metabolic disease that affects over 500 million people worldwide, who also suffer from its complications such as vascular and neuropathic disorders. Among these, Diabetic Foot Ulcer (DFU) is one of the most common lower limb complications, with up to 19%-34% (approximately one quarter) of diabetic patients likely to experience “Diabetic Foot Ulcers” at some point in their lives2. This article will delve into the basic knowledge and introduction of diabetic foot ulcers, as well as the mainstream wound classification systems.