Nail growth process

The growth of nails is caused by the proliferation, keratinization and forward movement of nail matrix cells at the root of nails. But the nail bed controls the growth of nails of a certain shape.

The growth rate of nails not only varies from person to person, but also is influenced by age, climate, day and night cycle, menstruation, nutrition, gender and other factors. Baby's nails grow about 0.7 mm per week, and the growth rate will increase with age. As adults, their nails can grow 1 ~ 1.4 mm per week on average, but most people will slow down after 30 years old. Nails grow fast in summer, slow in winter, fast in the morning and slow in the evening.

Extended data

Body signals on nails

80% people with kidney deficiency will find white spots on their nails in the early stage. In modern medicine, nails are located at the end of human body and are rich in tiny blood vessels and nerve endings, which is an important place to observe the precursors of many diseases. In traditional Chinese medicine, the kidney represents the energy storage of human body, while the liver represents the energy output.

Traditional Chinese medicine believes that the liver is in its claws, and "liver and kidney are homologous", which means that only rich reserves will have a steady supply of backup. Nails are at the end of the human body, and the surface of nails is bright and moist. The red and white part above the half-moon mark vaguely shows that blood can flow to the distal end fully. If there is black stagnation, it means that the distal meridian has been blocked.

Finding some white spots on nails may mean that qi and blood are not enough to maintain normal peripheral microcirculation, and the internal organs themselves are "deficient in qi and blood" from the superficial microcirculation.

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