There are many reasons for whitish nails on the middle finger of the left hand, and the common causes are fungal infection, lack of micronutrients, anemia, and so on. White nails are commonly caused by fungal infections. Nails with fungal infections are not only whitish in color, but also thickened, and the luster of the nails disappears and the nails become opaque. At this time, consider the use of antifungal drug treatment, such as: terbinafine hydrochloride, itraconazole and so on. Nail whitening can also be seen in the lack of trace elements, trace elements involved in the growth of nails, if the lack of zinc, calcium, magnesium and other trace elements, nails may become white. White nails may also be anemia, anemia patients with reduced blood volume in the endings of the limbs will cause the nails to look bloodless, will also make the nail color looks white. In summary, white nails can go to the regular hospital to further identify the cause of the disease.