Influenza is an acute respiratory infection caused by the influenza virus. Symptoms include sudden high fever, headache, body aches, and fatigue.
For those who are sick with the flu, when symptoms appear. เล่นเกมคาสิโน UFABET ทันสมัย ฝากถอนง่าย .They usually occur immediately with a high fever of 38 – 41 degrees Celsius, a feeling of heat and cold, aches and pains in muscles and various parts of the body, especially in the upper arms, sciatica, and thighs. Then there will be a headache, pain in the eyeballs when moving, and tears will come out when exposed to light. Then you will feel tired, have no appetite, and a bitter taste in your throat. In addition, you will have a sore throat, a stuffy nose, a runny nose, a dry cough, a feeling of fullness in the stomach, nausea, and the urge to vomit. However, in some cases, you may not have a stuffy nose or a cold at all.

In addition, there are other symptoms as follows:
- In severe cases of influenza, complications may occur, such as a runny nose or thick, yellow, or green phlegm, earache, tinnitus, shortness of breath, wheezing, severe coughing, chills, lethargy, dizziness, confusion, and/or heart failure.
- Symptoms of influenza usually appear for about 1-7 days, with the most common being 3-5 days. Coughing and feeling weak may last for about 1-4 weeks, even if other symptoms have subsided.
- In some patients, after recovering from the flu, they may experience vertigo due to inflammation of the balance organ in the inner ear.