There are many reasons for body weakness, the human body after excessive exertion or after staying up late for a long time without sufficient rest will appear weakness symptoms, just pay attention to rest can be. Kidney deficiency and physical weakness may cause weakness, patients with weak spleen and stomach may experience weakness due to loss of appetite as a result of gastrointestinal disorders, patients with colds may experience weakness, and some patients with long-term symptoms of low immunity may experience weakness. Cerebral vascular disease can cause the body to have insufficient blood supply to the brain can also cause weakness. Severe hypothyroidism and chronic wasting diseases, such as malignant tumors and tuberculosis, may also cause weakness.