The patient was treated with blood patch and the headaches completely resolved. This is a typical example of spontanous intracranial hypotension. Spontaneous intracranial hypotension most commonly results from CSF leaks in the cervical and thoracic spine, and leads to alterations in the equilibrium between the volumes of intracranial blood, CSF, and brain tissue (Monro - Kellie hypothesis). A decrease in CSF volume leads to compensatory dilatation of the vascular spaces, mostly venous side due to its higher compliance.