Flu symptoms often appear suddenly and can range from mild to severe, making it crucial to distinguish them from the common cold or other respiratory illnesses. Given below are some of the most common signs of flu:
1. Fever and Chills
One of the common signs of the flu is a sudden high fever, often accompanied by chills. To fight against the virus, the body elevates its temperature as a defence mechanism. Temperatures can range from mild to high, depending on the individuals and severity of the influenza virus.
2. Persistent Cough and Sore Throat
The influenza virus frequently causes inflammation in the respiratory tract, leading to a dry or productive cough. A sore throat often accompanies this, making swallowing uncomfortable and creating a raw sensation.
3. Fatigue and Muscle Aches
The symptoms of flu include fatigue and body aches. Individuals may feel tiredness in muscles, particularly in the back, legs, and arms.
4. Headaches
Headaches are the most common sign of flu, resulting from sinus pressure and inflammation. A runny nose may also occur, though they are less prominent than in cases of the common cold.
5. Gastrointestinal Symptoms
Influenza affects the respiratory system of the human body. Influenza symptoms occur in children, causing them vomiting or diarrhea. These symptoms are less common in adults but still possible.
In other infections, symptoms can appear within a few hours. But, in the case of flu, these influenza symptoms are not the same as sneezing, coughing, and a runny nose seen in the common cold. In the flu, without any sign of halting, a person can be perfectly healthy one moment before suddenly feeling sick the next.
The flu can cause symptoms of varying severity. While some would indicate them as flu symptoms, it is clear that flu, unlike the common cold, is abrupt and intense.