Allergies because you contact caused by a particular substance, but cold is caused by a contagious virus.
And allergies and colds will be accompanied by a runny nose, sneezing, itchy throat. But allergies can cause itchy eyes tearing, and dry cough cough is caused by allergies. In turn, coughing and sneezing with phlegm like a cold.
Other Criteria include:
When allergy nose was clear, while a cold start nose was clear, but after a few days snot yellow or greenish.
Allergies no fever, flu-like fever.
Colds often last 5-10 days, allergy time may be very long.
Time can be used to determine the incidence of allergies or colds, when each spring flowering tree has a "cold" is likely to be allergic to pollen.
If your blocked nose, allergies and colds are likely to develop sinusitis . The main symptoms are runny nose, sinusitis, and allergies and colds is different, it will be accompanied by fever, sinus, skin irritation, pain and other symptoms.