The patient: a diabetic, half a month, at the beginning was hit by something, but did not know, and then began to thicken before you know, went to the hospital to treat, and also opened a wound to thick drain, now the wound is healing, but the skin on the back of the foot is dark red color, edema, the beginning of the edema is soft, but now press down a little hard, want to take a hot water bag bundled with a towel to put on the back of the foot, but the back of the foot can not feel the temperature, but later removed and felt a little pain on the skin, and after a few minutes, blisters. But the back of the foot can not feel the temperature on the back of the foot for a few minutes, then take it away and feel a little pain on the skin, and then after a few minutes on the blisters, the doctor told to take alcohol to apply, like this situation to deal with how to deal with it? Will it burn the skin, now press down and still feel a little, is this situation does not matter? Doctor: Diabetic foot is a common type of clinically intractable trauma, and has some unique characteristics. First of all, if diabetic patients have poor long-term blood sugar control, there will be damage to the peripheral nerves and arteries of the limbs, resulting in reduced sensory ability of the skin and dull sensation, which is most likely to occur in both lower limbs, especially in both feet and both lower legs, and sometimes also in the hands. In addition, some trauma, even small stones in the shoes can also hurt the feet, so the feet of diabetics themselves are prone to injury and trauma. Secondly, high blood sugar will affect the chemotactic ability of white blood cells, so that the ability of local resistance to infection is reduced, in addition, peripheral nerve and artery damage resulting in the skin and subcutaneous tissue nutrition of the feet is also very poor, so the chances of wound infection and non-healing will be significantly higher, if the treatment is not timely or unreasonable, and even wound deterioration, often a high rate of amputation, and sometimes need high amputation to close the The trauma. For the wound, several principles need to be noted, first, must control the blood sugar, generally to 9-10mmol/L or less is appropriate; second, the local wound should be drained smoothly, regular cleaning and drug changes; third, strengthen the anti-infection, sometimes you can use anti-infective creams such as Bactroban, if the wound around the redness and swelling and other inflammatory reaction is obvious, or even accompanied by systemic fever and other symptoms of infection, then the appropriate use of systemic intravenous Fourth, elevate the affected limb and try to move on the ground as little as possible. Try to go to an experienced hospital for systematic treatment.