How can you tell the difference between a cold and allergy when symptoms can be so similar? If you’re experiencing body aches, it’s likely a cold or flu. Fever? Cold or flu. Symptoms including watery eyes, sore throat, and runny or stuffy nose can be symptoms of “bugs” or allergy. If symptoms last for more than a couple of weeks, it’s likely that you have ongoing allergy exposure triggering your symptoms. For more about the difference between a cold and allergy, visit our website.