Calf tibia fracture cast 40 days and ants crawling feeling consider local skin itching, fracture bone scab growth, local soft tissue repair. Tibia fracture with plaster, due to the long-term fixation of the plaster, plaster compression leads to poor local blood circulation, poor ventilation of the local plaster, the skin is in a moist environment, and the skin surface keratin layer is constantly renewed, the old skin is not off, resulting in local skin itching, ants crawling sensation. Fracture fixation for 40 days, bone scab formation at the fracture, osteoclasts and osteoblasts are active, local bone proliferation, dead bone resorption, producing the feeling of ants crawling on the broken end of the fracture. Tibia at the soft tissue cover less, local blood circulation is poor, if the tibia fracture, accompanied by soft tissue due to poor local blood transport, soft tissue recovery is slow, 40 days after the fracture is still in the repair period, there is an abnormal feeling. Calf tibia fracture cast 40 days still have discomfort, it is recommended to actively consult the doctor, under the guidance of the physician treatment.