Do I have the cold or the flu?
It can often be difficult to tell them apart. However the following tips might help you distinguish between them. A cold is generally milder than the flu, and is often accompanied with a runny nose. You may or may not have a fever, usually low grade (≤ 38,5). Symptoms often last only a few days.
Flu symptoms are often accompanied with systemic symptoms, such as muscle aches, extreme tiredness, and headache. Fever tends to be high (≥ 38,5) and lasts longer. You may even experience some gastrointestinal symptoms, like vomiting or diarrhea. The flu can result in severe complications like pneumonia and even hospitalization.