After the calf flap surgery, how long it takes to get off the ground depends on whether the surgery is successful or not, but also depends on the size of the flap in the surgical location, the flap is smaller in general in two weeks or a month or so can get off the ground, the flap area is bigger, then it will take about two to three months to get off the ground. 1. 7 days after the flap surgery, the flap is in the stage of change, in the danger period, 7 days later if the flap is still alive, it means that has successfully passed the flap danger period. 2. After the flap surgery, the sagging calf will be easily swollen, if the flap is swollen around the flap, it will affect the survival of the flap, remove the surgical line and observe the situation of the incision, if there is no cracking or oozing out of the stuff, you can try to walk around appropriately. 3. After the operation, we should pay attention to the protection of the skin flap, pay attention to the observation of local blood circulation, skin temperature, skin color and other conditions of the skin flap, and keep the local clean, dry, and regularly change the medicine, avoid collision, extrusion, trauma, friction and other situations, pay attention to preventing the wound from infection, in order to ensure that the normal survival of the skin flap. 4. After the successful survival of the flap, it is still necessary to protect the surrounding area of the flap and the flap to avoid infection, and to avoid wearing clothes and shoes that may cause cuts and scrapes to the flap and the surrounding area, resulting in necrosis of the flap.