If you wake up from a nap and feel weak and very soft, there are usually the following factors: 1, the most common factor is ionic disorders, after waking up from a nap, if there is sudden hypokalemia and hyponatremia, there will be symptoms of weakness. 2, such as when the body is infected after waking up from a nap, at this time, if there is fever and fever in the body, there will also be weakness, and the clinical symptoms and performance of feeling very soft. 3, such as infectious factors, which are represented by bacterial infections, fungal infections and viral infections. For example, infectious factors, of which bacterial infection, fungal infection and viral infection are prominent representatives. When the body releases immune complexes to eliminate viruses, the clinical symptoms and manifestations of weakness and tenderness will occur. 4, common causes are also lack of oxygen, such as insufficient oxygen content during sleep, when the body oxygen saturation is not enough, the clinical symptoms and manifestations of weakness and tenderness will occur. 5, common due to insufficient coronary artery blood supply, the clinical symptoms and manifestations of weakness and tenderness will also occur. The clinical symptoms and manifestations of weakness and tenderness may also occur when the coronary artery supply is insufficient.