When you have weakness, you must pay attention to rest, this time you can put down the work at hand, for a relatively quiet sleep, so that the body to restore physical strength and energy, will gradually improve the state of weakness. And you can go to the hospital to check the body, check the blood routine, to see if there is anemia. In anemia, red blood cells and hemoglobin are low, which will lead to weakness and pallor. When the thyroid gland is hypothyroid, one will experience fatigue, weakness, fatigue and sleepiness, which will improve immediately after supplementation with eugenol, the thyroid hormone. You can also seek the help of a Traditional Chinese Medicine (TCM) doctor for comprehensive body conditioning.