Problems that can occur after knee surgery include blood clots in the leg vein that can travel to the lungs, according to Houston Methodist Orthopedics & Sports Medicine. Infection is also a complication of knee surgery.
After knee replacement surgery, heart attack, stroke and nerve damage are also risks, according to Mayo Clinic. The artificial joint can also fail and wears out eventually. If the knee becomes infected, the patient experiences chills, fever and redness or swelling around the joint. The surgical site may also drain. The artificial knee needs to be removed, and the patient is started on a course of antibiotics. Eventually, the artificial knee is replaced with a new one.
If the patient experiences a blood clot in the lung, or pulmonary embolism he experiences chest pain and shortness of breath and may even go into shock, according to MedicineNet. Doctors try to prevent blood clots by fitting the patient with compression stockings and prescribing anticoagulants, says Houston Methodist Orthopedics & Sports Medicine.
Some patients find that the surgery doesn't ease their pain, according to the American Academy of Orthopaedic Surgeons. However, problems and complications after knee surgery are rare, and patients with pre-existing conditions such as heart disease or infections are more at risk.