Nerves are usually not edematous 20 days after cervical spine surgery, but not absolutely. After cervical spine surgery, most patients recover from nerve edema in about a week to two weeks time after surgery. So 20 days after cervical spine surgery, the nerves are usually not edematous, but some patients with slower recovery or incomplete surgery can still be accompanied by nerve edema. Patients with cervical spine disease, after cervical spine surgery will obviously feel symptomatic relief and relaxed, but some patients with longer cervical spine disease, nerve compression is heavier, often need a longer time to recover. During the recovery period, patients can take methylcobalamin tablets and other nerve-nourishing drugs to reduce nerve edema under the guidance of the doctor. After cervical spine surgery, patients need to avoid substantial neck activities. If there are any uncomfortable symptoms, you need to consult a doctor in time.