Postdural Puncture Headache Relief With Aminophylline and SPGB

Inclusion Criteria: * 18 - 40 years old female. * ASA I -II according to the American society of anesthesiologists. * Spinal anesthesia with 22G Quincke needle for cesarean section. * PDPH was defined according to the international classification of headache disorders, 3rd edition criteria (ICHD-3) as: * Headache occurring within 5 days of a lumbar puncture. * Orthostatic headache that significantly worsens soon after sitting upright or standing and/or improves after lying horizontally usually accompanied by neck pain, tinnitus, changes in hearing, photophobia, and/or nausea. * Exclusion of other causes such as hypertension, preeclampsia, tension headache, migraine, etc. Exclusion Criteria: * A history of headaches that could interfere with the PDPH diagnosis, * A history of central nervous system diseases, including intracranial hemorrhage, seizures, intracranial hypertension, or hydrocephalus * A history of cardiovascular diseases, including coronary heart disease, arrhythmias, or hypertension. * A history of allergy to or any contraindication for using Aminophylline. * Coagulopathy. * Nasal septal deviation, polyp, or nasal bleeding. * General anesthesia after failed spinal anesthesia.