Walking with a limp after 4 months of fracture should be treated with general therapy, medication, physiotherapy and surgery according to the cause, which may be due to incomplete recovery, muscle atrophy, nerve damage and other reasons. 1. Incomplete recovery: If one’s ability to recover is poor, walking with a limp will occur when one has not fully recovered, one should continue to strengthen the treatment, and can carry out physical therapy, such as shock wave, to accelerate the local recovery. And the functional exercise of the lower limbs should be strengthened. If there is no formal treatment and the fracture is expected to fail to heal, surgical incision and internal fixation should be carried out in time. 2. Muscle atrophy: After the fracture, muscle atrophy may occur due to long time inactivity of the muscles, which may also cause limping. You can strengthen the local muscle exercise, reasonable diet, ensure balanced nutrition. 3. Nerve damage: If the local nerve damage causes limping, you can use methylcobalamin and other nerve-nourishing drugs for treatment. There are other reasons for walking with a limp 4 months after the fracture, it is recommended to go to the hospital for examination and diagnosis in a timely manner, under the guidance of a professional doctor to carry out targeted treatment as well as taking medication.