Adult nails are 1 to 1.4 mm long per week, and too fast or too slow may be a disease. Some people say: People have long hair and long nails. Although there is no exact basis for this, the growth rate of nails does vary within a year. In addition, Chinese medicine believes that each person’s nail growth rate is not exactly the same, it is closely related to people’s health status. It is generally believed that the growth rate of nails varies not only from person to person, but also from age, climate, day and night cycle, menstruation, nutrition, gender and other factors.
The baby’s nails grow about 0.7 mm per week. As you get older, your growth rate increases. After you reach adulthood, your nails can grow 1 to 1.4 mm per week, but most people will be 30 years old and their nail growth rate will slow down.
The growth rate of nails is different at different times of the year and day. Generally, the nails grow fastest in the summer and the slowest in the winter; the nails grow the fastest in the morning and the slowest in the evening. Women’s nails accelerate their growth during premenstrual and pregnancy.
Frequent rubbing also increases the speed of nail growth, so people who are used to the right hand, the right hand nail grows faster than the left hand nail, and the fingernail grows 3 to 4 times faster than the toenails. The growth rate of each nail is not exactly the same. Usually, the longer the finger, the faster the nail grows. For example, the index finger, middle finger and ring finger grow faster than the thumb and thumb.
Malnutrition or taking certain medications can also affect the growth rate of your nails. Good nutrition, nails can grow normally; if malnutrition or anorexia nervosa, nails will grow slowly, and some lateral grooves called Bosch line appear.
The growth rate of nails is also related to people’s mood. When people are in a good mood, the nails will look smooth and shiny. This is because happy body and mind can promote blood circulation, increase local blood flow, and provide more nutrition to nails.
Whether the nail grows fast is related to “heart” is hard to be determined, but it has been found that the nail growth rate is closely related to some pathological changes in the human body. For example, when suffering from hyperthyroidism, congenital heart disease, Parkinson’s syndrome, pregnancy disease, nail growth will accelerate, and in the case of diseases such as hypothyroidism, renal insufficiency, diabetes, malnutrition, etc., nail growth It will slow down.