It is not possible to determine the disease based on the symptom of general malaise alone. There are many diseases that cause generalized discomfort, such as colds, intestinal infections, hypoglycemia, anxiety disorders, and so on. 1. Cold and flu: Infection by pathogenic microorganisms such as viruses or bacteria can lead to inflammation in the upper respiratory tract, causing inflammatory and toxic substances to reach the whole body along with the blood circulation, thus causing general malaise. 2. Intestinal infections: severe diarrhea can lead to electrolyte disorders in the body, resulting in excessive loss of potassium ions in the body and causing symptoms of weakness. 3. Hypoglycemia: When the blood sugar concentration in the body is too low, it will affect the metabolic activity of the muscles, which cannot provide strength for the muscles and cause weakness of the whole body muscles. It also stimulates the sympathetic nerves, making them excited and causing palpitations and tremors. 4. Anxiety: Due to the pressure of life or study, it causes excessive anxiety and affects the quality of sleep, which leads to insufficient blood supply to the local tissues of the brain, resulting in generalized fatigue and other uncomfortable symptoms. In order to clarify the cause of generalized discomfort, it is recommended to go to the hospital as soon as possible and undergo a comprehensive examination.