
Fingernail moons, or lunulae, are the rounded shadows at the base of your nails. The lunula is the visible portion of the matrix, the pocket under the skin where nails grow. The visibility of the lunula can vary depending on skin colour and other factors, and it may be hidden under the skin. While the absence of a lunula doesn't always indicate a serious health problem, it could be a sign of a vitamin deficiency or medical condition. In some cases, it may be a good idea to discuss the issue with a doctor.
| Characteristics | Values |
|---|---|
| Name of circles on nails | Fingernail moons, lunula (Latin for little moon) or half-moons |
| What they are | The rounded shadows at the base of your nails |
| Where they are | The visible portion of the matrix (the pocket under the skin where nails grow) |
| Why they might not be visible | They could be hidden under the skin, or it could be a sign of a vitamin deficiency or medical condition |
| What to do if they're not visible | Discuss with a doctor, but it's not always a cause for concern |
| What to do if you notice a dark streak running the length of the nail | Contact your doctor, as it could be melanoma |
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What You'll Learn
- The absence of lunula (the rounded shadows at the base of your nails) could mean a vitamin deficiency or a medical condition
- A dark streak that runs the length of the nail could be melanoma, the deadliest form of skin cancer
- Indented horizontal lines on nails could indicate a serious illness, injury or shock to the system
- The prominence of the lunula indicates the height of the matrix (the pocket inside the skin where nails grow)
- Skin colour and other factors can make the lunula more or less visible

The absence of lunula (the rounded shadows at the base of your nails) could mean a vitamin deficiency or a medical condition
The absence of lunula, or the rounded shadows at the base of your nails, could mean a vitamin deficiency or a medical condition. However, it is important to note that not being able to see your fingernail moons does not always indicate a serious health problem. Sometimes, the lunula is simply hidden under your skin or cuticle, especially for nail biters or those with more cuticle growth. The lunula is part of the matrix, which is the pocket inside the skin where nails grow and new cells are made. The visibility of the lunula can depend on various factors, such as skin colour. While the absence of lunula may not always be a cause for concern, it is recommended to discuss any concerns with a doctor.
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A dark streak that runs the length of the nail could be melanoma, the deadliest form of skin cancer
Fingernail moons, or lunulae, are the rounded shadows at the base of your nails. The absence of these moons doesn't always indicate a serious health problem, but it is a good idea to discuss the issue with a doctor.
If you notice a dark streak that runs the length of the nail, contact your doctor. It could be melanoma, the deadliest form of skin cancer. Melanomas can appear on or around the fingernail, so be sure to check the skin around your nail, too. Unlike heart disease, kidney disorders and other conditions, melanoma doesn’t usually cause other noticeable symptoms. So if you get a solitary new band on a nail, you should definitely see a dermatologist about that.
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Indented horizontal lines on nails could indicate a serious illness, injury or shock to the system
Fingernail moons, or lunula, are the rounded shadows at the base of your nails. The lunula is part of the matrix, which is the place where each nail begins growing and where new cells are made. Not being able to see your fingernail moons doesn't always mean that something is wrong with your health. Sometimes, you may only be able to see lunula on your thumbs, or possibly not on any fingers at all. In these cases, the lunula is most likely hidden under your skin. Small or missing lunula usually aren't a cause for concern. They're usually just hidden underneath the cuticle or skin at the base of the finger, especially on nail biters or those with more cuticle growth. However, the absence of lunulae can sometimes provide clues about a person's health, so it is a good idea to discuss the issue with a doctor.
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The prominence of the lunula indicates the height of the matrix (the pocket inside the skin where nails grow)
The lunula is the rounded shadow at the base of your nails, also known as the 'half-moon' or 'fingernail moon'. The lunula is part of the matrix, which is the pocket inside the skin where nails grow. The prominence of the lunula indicates the height of the matrix. If the lunula is more prominent, the matrix is usually sitting higher on the nail. If you don't have a visible lunula, it simply means that the matrix is sitting lower on the nail. This is common in individuals who bite their nails or have more cuticle growth. The absence of a lunula doesn't always indicate a serious health problem, but it could be a sign of a vitamin deficiency or a medical condition.
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Skin colour and other factors can make the lunula more or less visible
The circles at the base of your nails are called fingernail moons, or lunula in Latin. The lunula is part of the matrix, the pocket of skin where nails grow from. The visibility of the lunula depends on the prominence of the matrix, which varies from person to person. Skin colour and other factors, such as cuticle growth, can make the lunula more or less visible. For example, those with darker skin tones may find it harder to see the lunula. Similarly, nail biters or those with more cuticle growth may find that their lunula is hidden underneath the skin.
The lunula is the newest portion of the nail, and its absence can sometimes indicate a vitamin deficiency or medical condition. However, this is not always the case, and small or missing lunula are usually not a cause for concern. If you are concerned about the visibility of your lunula, it is a good idea to discuss the issue with a doctor.
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Frequently asked questions
The circles on your nails are called lunula, or lunulae in the plural. They are also known as fingernail moons.
The visibility of the lunula can be affected by skin colour and other factors. If you can't see the lunula, it could mean that the matrix is sitting lower on that nail, or that it is hidden under your skin.
The absence of lunulae does not always indicate a serious health problem, but it could mean that you have a vitamin deficiency or a medical condition. It is a good idea to discuss the issue with a doctor.
You should contact your doctor, as it could be melanoma, the deadliest form of skin cancer. Melanomas can appear on or around the fingernail, and may not cause other noticeable symptoms.
This could be a sign that you experienced a serious illness or sustained an injury or shock to your system that caused your nails to temporarily stop growing.









































