What is the reason for the lack of healthy nails?

In fact, there is currently no authoritative clinical guideline that uses the number of healthy circles on nails (also known as half-moon marks in medicine) as a criterion for disease determination. Most people's lack of healthy circles is either genetically inherited, or it is just related to daily hand habits and basal metabolic rate. It is not necessarily related to Internet legends such as "physical deficiency" and "kidney deficiency", so there is really no need to be overly anxious.

A while ago, I met a young girl born in the 2000s in the clinic. She could only see a few healthy circles on her thumbs among her ten fingers. She read a short video and saw that if there were less than 6 health circles, she would suffer a huge loss of energy and blood. She was so scared that she drank Astragalus Codonopsis water for more than half a month. As a result, she got so angry that she could not even eat because of oral ulcers. She went for a physical examination and found no problems. When I asked her, I found out that her mother was also born with healthy circles on only two thumbs. It is completely an inherited individual difference.

Of course, some practitioners in the field of traditional medicine will use changes in half-moon marks as a reference for physical condition. What I mean here is that "changes" are not inherently small in number - if you have had seven or eight health circles before, and more than half of them suddenly disappear in a short period of time, and you are still tired at every turn, afraid of cold, and have a sallow complexion, it is most likely caused by a recent slowdown in metabolism, failure to keep up with nutritional intake, or staying up too late. At this time, adjusting your work and rest and supplementing with protein will usually bring you back slowly, and it is not a sign of a serious illness.

To put it bluntly, the essence of the health circle is the new nail that has not been completely keratinized at the root of the nail, just like the dividing line between the newly grown hair and the previously dyed hair. If your nails grow slowly, or the nail matrix grows farther back, and the non-keratinized part is blocked by the skin behind, the health circle will naturally not be visible. This is the case for most people who are born with soft nails, use less hands, and whose nails wear slowly. There is no need to take supplements blindly because of this.

What you really need to be wary of is sudden abnormal changes in the health circle, such as rapidly increasing in number and size in a short period of time, or suddenly disappearing together with uneven, thickened and brittle nails. Then you need to check whether it is a thyroid abnormality, anemia or onychomycosis. It is really nothing if you are born with a small number.