Thanks for writing to H.C.M. for your query.
I have gone through your query regardin cold
with green discharge and headache over forehead. You are having nasal obstruction
as well and all these symptoms indicates that you are having acute Rhinosinusitis.
For effective treatment you are advice for these basic investigations-
(1) C.T.scan of paranasal sinuses
(2) Culture and sensitivity of nasal discharge.
(3) Blood - CBC, blood sugar - R. & P.P.
(4) Urine - Routine & microscopic.
Apart from this tharough examination along with co-relation of investigation results we can reach to correct diagnosis which lateron can be plan for treatment. Till investigation reports are awaited you can take antibiotic, anti inflammatory, anti allergic, decongestant and steam inhalation.
Wishing for your speedy recovery.