One of the main manifestations of diabetic foot is ulcers, the second is co-infection, and some patients may even develop purple toes and gangrene, while others may develop severe deformation of the foot. How can early detection be achieved in the earliest stage of the disease? Early manifestations may be a limb end, called gloves, glove-like sensory loss, as if you obviously do not wear socks or gloves, but you touch something, you feel like wearing a layer of gloves or socks to touch something else, this kind of sensory loss, starting from the very end of the limb, this is the early manifestation of peripheral vascular disease; we find that the skin of the limb becomes thin, the skin texture will disappear and become very thin. We find that the skin of the limb becomes thin, the texture of the skin disappears, it becomes very shiny and thin, and the hair is sparse, which is also an early manifestation. In the later stages, secondary vascular blockage will slowly appear, causing ischemia of the limb extremities, purple toes, and even black toes in some cases, and some patients will have ulcers that do not heal for a long time, with breaks that do not grow; some patients will have very serious deformities, most of which are severe flat feet, forefoot abduction, foot outward, and large bulges on the soles of the feet. The bulging area may have ulcers, which are all manifestations of diabetic foot.