If the blood blister ruptures, if it is a mild rupture with no bleeding tendency, it can be treated on its own, including local disinfection, medication, etc. If the trauma is relatively large and there is a tendency to bleed, it is recommended to seek medical attention in time. 1. Mild trauma: If it is only a relatively small blood blister, no tendency to continue bleeding after the rupture, you can handle it by yourself. For example, disinfect the wound with iodophor, scrub the wound, then apply erythromycin ointment or mupirocin ointment externally, and finally bandage the wound with Band-Aid or dressings, and change the dressing regularly. 2. Severe trauma: If the blood blister is large and has a tendency to bleed after rupture, and there is obvious pain, it is recommended to consult a doctor in time and carry out debridement under the guidance of a professional physician. When the bleeding is large, it is necessary to stop bleeding by pressure, or use gauze bandage to stop bleeding. After the bleeding is stopped, disinfect with iodophor, bandage, regular dressing change treatment, and follow the doctor’s instructions oral cefixime, amoxicillin and other antibiotics to prevent infection. After the blood blister is broken, do not often use your hands to squeeze, or knead with your hands, because there are bacteria on your hands, contact with the wound is easy to cross-infection, is not conducive to recovery. If you need to use drugs during the period, you should be under the guidance of a professional physician, do not take without authorization.