Cold and allergy are both a result of the body fighting different germs and viruses in case of cold, or fighting usual dust or pollen in case of allergy because the immunity system get confused between a natural substance with germs. The natural substances can be the dust, cockroaches, animal dander, mold or pollen. As it is very will known cold is contagious while allergy is not.
There are three common symptoms between cold and allergy which are sneezing, runny nose, fatigue and congestion. While there are other symptoms that differ between allergy and cold.
There are symptoms than appears mostly in the cases of allergies and rarely in the cases of cold as itchy eyes, watery eyes, itchy throat.
There are symptoms than appears mostly in the cases of cold and sometimes in the cases of allergy as fever, cough, sore throat, pain all over the body and headache.
Treating cold is by resting, taking pain relieves and cold fighting medicines, while the allergy needs other sorts of medication such as antihistamines and a more important factor which is avoiding the cause of allergy.
Differences between Allergy and cold :
If you catch cold in the both fall and spring then mostly it is allergy.
If the symptoms appears suddenly most probably it is allergy.
If the sneezing has taken about a week with no fever, cough, or sore throat then it is allergy, but if one of the symptoms appear along with the sneeze that it is probably cold.