1. If you have recurrent attack of cold you may be having sinusitis/allergic rhinitis
2. Take plain xray pns/ct scan of pns after consulting ent specialist to exclude sinusitis and take treatment accordingly. If it is chronic sinusitis you have to undergo endoscopic sinus surgery
3. If it is due to allergic rhinitis, do an allergy test after consulting allergy specialist/immunologist to find out the cause of allergy and follow the treatment and advice accordingly.