Nail crescent white slowly disappears may be digestive system dysfunction and lack of micronutrients caused. 1. Digestive system dysfunction: mainly due to long-term irregular diet caused by digestive system dysfunction, resulting in malnutrition, so that the supply of nutrients needed for the growth of the nails to reduce the phenomenon of slowly disappearing fingernail crescent white. 2. Lack of trace elements: the lack of trace elements can also lead to the phenomenon of slowly disappearing fingernail crescent white. In addition, the fingernail crescent is getting less and less may also be caused by anemia, may also be a physiological phenomenon, if necessary, should go to the hospital in a timely manner to clarify the cause of the disease, under the guidance of a professional physician, follow the doctor’s instructions for treatment, do not use their own medication, so as to avoid delays in the condition.