Nail root whitening may be caused by physiological factors such as crescent moon, or may be caused by trauma, nail fungus and other diseases. 1. Physiological factors: it is because the middle of the nail grows faster than the two sides, so it forms a half-moon shape on the nail, called crescent moon, the essence is the newborn or not fully keratinized nail plate protein or nail tissue, thus manifesting as white nail root. 2. trauma: nails due to extrusion caused by the nail bed detachment, resulting in the nail bed appear localized white spots, and thus have the symptoms of nail root whitening. 3. Ringworm: caused by dermatophyte infection, the nail plate can be cloudy, thickening, separation, discoloration, the color can be white, yellow or dirty color at the beginning, the patient will appear nail root whitening. There are many reasons that lead to the whitening of the root of the nail, it is recommended that the patient go to the hospital to clarify the cause of the disease and timely treatment.