With regard to wound healing, we actually have a strong ability to heal ourselves, which is an instinct that we are born with. That is to say, for every ordinary person, the wound will heal quickly after it appears. But there are exceptions to everything, such as for diabetic hyperglycemic patients, the wound is not only difficult to heal, but also serious infections, many people become disabled or even lose their lives! Usually, the wound self-repair needs to go through three stages: the inflammatory phase, which begins immediately after the injury and can last from a few hours to a few days; the granulation phase, which begins within a few hours to a few days after the injury and can last from one to three weeks; and the scarring phase, which begins about a week after the injury and can last from a few months to a few years. I should tell you, however, that some diseases and other causes can hinder wound healing, and diabetes is one of them. Among the three processes and stages mentioned above, the most worrying cause is actually infection. If a wound becomes infected, it will be difficult to heal, and there are many factors that can cause infection due to diabetes, such as: a. Wound infection caused by high blood sugar, because it involves bleeding and tissue fluid exudation, and high local nutrients in the wound, which provides the necessary conditions for the growth of germs; b. High blood sugar reduces the ability of the immune system to fight infection, such as white blood cells and phagocytes, which is also one of the causes of infection; c. Wounds that are already infected of the wound will also be difficult to heal, necrotic inflammatory tissue covering the surface of the wound, which will prevent the growth and metabolism of normal tissue. Fourth, diabetes causes complications lower limb vasculopathy, will lead to wound healing required blood, nutrients, drugs and other supply obstacles, wound healing is also very difficult or even not healing. The above is the main cause of diabetes caused by wound infection does not heal, once encountered with this situation, we must do the appropriate examination under the guidance of a professional doctor, find the problem timely correction, to avoid the gradual aggravation of the infection, causing serious physical and mental harm to patients.