thank you for your query. the condition which you are describing is called Cerebro Spinal Fluid Rhinnorhoea. In this condition, there is a leakage in the base of the skull which is connected to the nasal cavity, through which CSF (which is the fluid covering our brain and spinal cord) comes out. this can cause headache, and if infected (which is common if left untreated) may cause meningitis, encephalitis, seizures etc. this condition can occur following head trauma, surgery in the base of skull/ nose, tumor or even spontaneously. If an patient comes to me with your complaint, i would advice him an MRI scan of brain and would refer him urgently to an ENT specialist and/or Neurosurgeon. there is a distant possibilty that these symptoms are due to common cold or some viral infection, but CSF rhinnorhoea has to be ruled out as urgently as possible. hope I ve satisfied your query. Please don t hesitate to contact me for any further clarifications.