Whether or not you can use gauze bandage when you knocked your leg in the summer is decided according to the wound condition. 1. If the patient’s leg is broken in summer, if there is no obvious blood oozing out of the wound, and the epidermis is just peeling off, the wound can be bandaged without gauze, and the dust on the surface can be washed away with water and then applied with iodophor. If you use gauze bandage, the summer weather is hot, it will prompt the local skin of the wound to sweat more, causing the risk of infection of the wound. 2. If the patient’s leg is broken in the summer and the wound is bleeding, it is recommended that the patient should seek medical attention to have it professionally bandaged and have the dressing changed on a regular basis so that the wound can be kept in a cleaner and drier environment, reducing the risk of infection and helping the wound to heal. In summer, patients who have knocked their legs out should keep the wounds clean and do not get wet, which can cause wound infection.