How about nail whitening?

Nails are located at the ends of human limbs. They are like a mirror, reflecting the last cycle of the human body. 1, healthy people's nails are pink. Put ten nails in the sun to observe, and move your fingers up and down. If there is shiny reflection on the nail surface, it means that the overall health is in an excellent state and the functions of various organs in the body are intact and normal. 2. Brown longitudinal stripes or cracks appear on the nail surface, extending from the fingertip to the root of the nail, suggesting intestinal inflammatory lesions or suggesting vitamin deficiency and iron deficiency. Partial whitening of nails indicates zinc deficiency. Ordinary whitish indicates anemia. Brown stripes appear on nails, which is a signal of liver disease. But it is worth noting that this tan stripe should appear on ten fingernails at the same time, which is liver disease; Isolated appearance cannot be used as a basis for diagnosis. 3, if there are many thimble-like pits on the nails, most of them are the late symptoms of psoriasis. 4, finger swelling, purple halo on the nails, probably lung disease. Thin, brittle or even cracked nails indicate that there are diseases in the respiratory and circulatory system. 5, the nail is invaginated in the middle, spoon-shaped, indicating that you have diabetes, anemia, hyperthyroidism or malnutrition. 6. Dark red and purple blood spots under your nails often indicate that you have epilepsy and blood diseases.