How to tell if this is an allergy or cold?

Allergy or cold: Colds may last one to two weeks, with runny nose, nasal congestion, cough and sometimes fever. Allergies may be similar but often last longer and there is often sneezing, itchy eyes and nose, clear watery mucous. If in doubt see a doctor for proper diagnosis and treatment. Allergies tend to be chronic or recurrent and are often worse at the same time of year.

See a doctor.: A good physical examination by a physician can differentiate the two.