The pain inside three months after nephrectomy may be caused by neuralgia, or exertion, in addition, it may also be caused by secondary infection and other reasons. 1. Neuralgia: nephrectomy due to the lack of local location, may cause local tissues, nerves pulling caused by neuralgia, so it may lead to nephrectomy three months after the symptoms of pain inside. 2. Exertion: three months after nephrectomy, if due to the body’s exercise, exertion or sprain, etc., it may also lead to the symptoms of pain inside. 3. secondary infection: nephrectomy wound is large, if the wound site inside the pain, you should also consider whether there is secondary infection, observe whether the skin is red and swollen, and at the same time do ultrasound, blood routine and other auxiliary tests to clarify the diagnosis. Three months after nephrectomy, there may be other reasons for the pain, it is recommended to go to the hospital for examination and treatment as prescribed by the doctor.