One hundred days after the operation of comminuted fracture of the heel bone, the cause of the redness of the whole foot when walking on the ground with two crutches may be the increase of the venous pressure of the lower limbs, the venous embolism of the lower limbs, the recovery process after the fracture, and so on. 1. Increased venous pressure in the lower limbs: walking on the ground after heel fracture surgery can lead to increased venous pressure in the lower limbs under the effect of gravity, thus causing venous blood vessels to dilate and fill up, blood stagnation, and symptoms such as redness and swelling of the feet. Elevating the affected limbs will help the symptoms of redness and swelling subside. 2. Lower extremity venous embolism: after fracture surgery, if there is no functional exercise, it is easy to cause venous embolism, which leads to obstruction of venous return and redness and swelling of ankles, calves and other parts of the body. 3. Recovery process after the fracture: the external force and trauma that caused the comminuted fracture of the heel bone are more serious, plus the fracture of the heel bone is not fully recovered and healed one hundred days after the surgery, the blood circulation at the fracture is not normal, plus the affected limb needs to be adapted and recovered after a long time of not walking on the ground after the surgery, resulting in the phenomenon of redness of the whole foot after one hundred days of surgery for a comminuted fracture of the heel bone. The whole foot is red after a hundred days of crutch walking after surgery for a comminuted fracture of the heel bone, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then under the guidance of the doctor to give targeted treatment or treatment.