What are the symptoms of H1N1 flu?

Influenza A refers to influenza caused by the influenza A virus. It is an acute respiratory infectious disease that may present with symptoms such as fever, cough, muscle pain, fatigue, and diarrhea. If experiencing any discomfort, timely medical attention is recommended.

1. Fever

Influenza A is an acute respiratory infectious disease caused by the influenza A virus. After infection, the body's cells fight against the virus, and the resulting inflammatory response leads to fever. Body temperature usually rises above 39°C, often accompanied by chills and shivering.

2. Cough

As the influenza A virus invades the epithelial cells of the respiratory tract, it triggers a local inflammatory response, stimulating the cough reflex. The cough is typically dry or produces phlegm, which may contain blood streaks.

3. Muscle Pain

When the influenza A virus replicates in the body and releases toxins, it may trigger an immune response, leading to damage of muscle tissue and resulting in muscle pain, especially in the muscles of the back, arms, and legs.

4. Fatigue

The influenza A virus consumes the body's energy, and the immune system's response further increases energy demands, leading to reduced physical strength and feelings of fatigue.

5. Diarrhea

After the influenza A virus enters the body via droplets or contact, it generally causes gastrointestinal dysfunction, leading to symptoms such as diarrhea, stomach pain, and nausea.

In daily life, it is recommended to maintain good lifestyle and dietary habits, avoiding spicy and irritating foods. Additionally, maintaining good hygiene practices can effectively prevent the spread of the disease.