2. Examination of nervous system, including EEG;
3. Biochemical aspects: blood sugar, urea nitrogen and blood routine;
4, X-ray, skull and mastoid X-ray;
5. Patients with facial paralysis who are easily overlooked should be examined: facial nerve function examination, that is, nerve excitability examination, even for the youngest children with facial paralysis, and it is best to do it at the early stage of facial paralysis, by the same person every day, and sometimes salivary gland scintillation test may be done.