The limb weakness and tiredness may be caused by insufficient sleep time, anemia, hypokalemia and other factors. 1. Inadequate sleep: if you stay up late for a long time, sleep too short, the muscles of the body are not relaxed and are always in a tense state, the symptom of limb soreness, weakness and tiredness will appear. 2. Anemia: if the daily diet is not regular, the food intake is too single or the intestinal function is poor, malabsorption anemia will occur, resulting in limb weakness and body weakness and fatigue. 3. Hypokalemia: when electrolyte disorders occur in the body and low potassium occurs, it can lead to limb weakness and general weakness and fatigue. It may also be related to hypothyroidism and insufficient blood supply to the brain, etc. It is suggested that patients should go to the hospital in time for treatment under the guidance of the doctor.