Hyperkalemia can be detected by doing blood tests. Clinical symptoms of patients with hyperkalemia include weakness, muscle weakness and paralysis, etc. If you have any of these symptoms, you should go to the hospital in time for examination, and laboratory tests such as blood test (blood potassium <3.5mmol/L) can be done for diagnosis. In addition to laboratory tests, imaging tests such as electrocardiogram can also assist in the diagnosis of hyperkalemia. Hyperkalemia is a pathological state in which serum potassium is lower than the normal physiological minimum concentration, and is divided into potassium deficiency hyperkalemia, metastatic hyperkalemia and dilutional hyperkalemia. Hypokalemia is mainly caused by too little potassium intake or too much potassium excretion through sweat and urine. It is recommended that patients should cooperate with the doctor for timely treatment when the blood potassium <3.5mmol/L on the blood test list.