Flu symptoms typically begin suddenly and can include fever, chills, and body aches. Many people also experience fatigue, headaches, and a dry cough. Some may have a sore throat or runny nose, while others might feel nauseous or have gastrointestinal issues. In addition to these common symptoms, the influenza virus can lead to complications, especially in vulnerable populations like the elderly or those with weakened immune systems. It's important to rest, stay hydrated, and consult a healthcare provider if symptoms worsen or persist.