The common cold and the flu share some symptoms. According to the Centers for Disease Control and Prevention, the symptoms are so similar that a diagnosis based on symptoms alone is extremely difficult. In regards to symptoms, the main difference between these two conditions is that the symptoms associated with the flu are worse and come on more suddenly than those associated with a cold.
Fever
According to the American Academy of Family Physicians, a fever associated with the flu will be over 102 degrees F, while a fever associated with a cold will be less than 102 degrees F. While the fever from either condition may be managed with over the counter medications, such as acetaminophen, the fever will usually come back as the medication wears off.
Aches
Muscle aches and headaches are common with both the flu and colds. Generally, the muscle aches associated with the flu are more prevalent in the back, arms and legs. If you have the flu, these aches are likely accompanied by chills and sweating. With colds and the flu, you may experience fatigue that doesn't go away with extra sleep.
Nasal Symptoms
A runny nose is associated with a cold, while a stuffy nose is associated with both a cold and the flu. Coughing may accompany the nasal symptoms in either case. A sore throat is usually associated only with a cold and may be caused by postnasal drip.
Gastrointestinal Symptoms
Generally, nausea and vomiting are only associated with the flu. A loss of appetite may also occur. Despite these symptoms, it is vital to stay hydrated.
