Hello, Thanks for writing to HealthCareMagic, I am Dr Muhammd Ahmad, I have closely read your question and I understand your concerns, I will hereby guide you regarding your health related problem. Usually it happens when your respiratory tract is sensitive to cold this can normally happen in days when there is much old or days when irritant suabstances like pollen is there in the air in large quantities. usually this settles by itself i would suggest you not a panic and adapt wait and observe policy hopefully things will get fine with time. I hope this answered your question, if you have more feel free to ask,otherwise close the discussion and rate it. Regards. Dr.Muhammad Ahmad. General and Family Physician..