Have you ever looked closely at your fingernail or toenail and noticed a white line running across it, like a white paint line? You might have thought it was just a coincidence, something that happened when your nail got hit somewhere. However, these white lines can also be a sign of a serious underlying condition. So, it's not a good idea to ignore them. Today, we'll talk about what Mees' lines are, why they form, and what to do if you see them.
What are these Mees' Lines?
Simply put, Mees' lines are white lines or bands that appear on your fingernails or toenails. They run horizontally, not vertically , across the nail. To be precise, they run parallel to the base of your nail (cuticle) and the white part of the nail.
These stripes have several special characteristics:
- Usually, these stripes run the entire width of the nail.
- These start at the base of the nail and gradually move upward as the nail grows.
- If you touch this line, it is very smooth. There are no knots, bumps, or roughness.
- These can appear on just one nail or on all nails at once.
Although this condition is called Mees' lines among doctors, it is also known by names such as Aldrich-Mees' lines, Leukonychia striata, Reynolds' lines, and Transverse leukonychia.
Are these stripes really serious?
To be honest, yes . These streaks are not something that just happens. Most of the time, they are a sign that something is wrong with our body. That is, these white streaks are not a disease, but a symptom of an underlying condition. Therefore, if you see streaks like this on your nails, don't ignore them. You should definitely see a doctor and get advice.
What are the main reasons for the formation of Mees' Lines?
Mees' lines have historically been associated with arsenic poisoning . This is because it was first identified as a major symptom of arsenic poisoning. It can also be caused by other heavy metals, such as thallium or selenium.
However, in addition to poisoning, Mees' lines can also be caused by several other serious medical conditions. Let's take a look at what they are.
| Cause | A simple explanation |
|---|---|
| Arsenic/Heavy Metal Poisoning | This is the most famous and common reason. |
| Chemotherapy | It can occur as a side effect of powerful drug treatments for cancer. |
| Kidney Failure | It can occur when the kidneys fail to function properly due to the accumulation of toxins in the body. |
| Non-heart failure | Impaired heart function affects blood circulation in the body. |
| Carbon Monoxide Poisoning | A condition caused by excessive inhalation of things like smoke and vehicle exhaust. |
| Cancer | It is especially seen in cancer conditions such as Hodgkin lymphoma. |
| Other infections and diseases | Conditions such as malaria, leprosy, and altitude sickness that occur when traveling to high altitudes. |
What kind of tests will the doctor do if he sees these lines?
When you go to a doctor, he will likely run several tests to find the cause of these white lines.
- Physical examination: First, you will be thoroughly examined. Things like the nature of your nails and the position of the lines will be carefully studied.
- Asking about your medical history: Questions will be asked about the medications you take, your occupation, your living environment, and whether you have been exposed to any toxins.
- Blood tests: Blood tests are ordered to check for other medical conditions (kidney, heart-related).
- Nail and hair sample testing: If poisoning is suspected, a nail and hair sample can be sent for testing to determine if heavy metals like arsenic are present in your body.
If there is a suspicion of poisoning, the doctor can also seek advice by calling the National Poisons Information Centre at the Colombo National Hospital , if necessary.
What is the difference between Mees' Lines and other white lines?
Not all white lines on the nails are Mees' lines. There are other conditions that look similar to these, but have completely different causes. Let's clearly distinguish and understand the difference between them.
| Characteristic | Mees' Lines | Muehrcke Lines | A nail injury |
|---|---|---|---|
| Number of stripes | Usually a single line | In pairs (two lines) | Usually one |
| When pressed | Does not erase | Fading away | Does not erase |
| When the nail grows | The sun is moving upwards. | The stripes are in the same place. | The sun is moving upwards. |
| Line width | Across the entire width of the nail | Across the entire width of the nail | Often only on part of the nail |
Muehrcke lines are caused by conditions such as hypoalbuminemia, liver disease, and malnutrition. Therefore, it is best to see a doctor to find out exactly what type of white lines you are seeing.
Treatment and recovery
The good news is that Mees' lines do not require any specific treatment, as they are a symptom, not a disease.
Imagine that you have these stripes because of chemotherapy. After your treatment cycle is over, the new nails that grow back will not have these stripes. The old striped part of the nail will grow out and disappear completely when you cut it off.
Also, if the cause is arsenic poisoning, all you need to do, together with your doctor, is find the route through which the arsenic is entering your body and stop it. It could be from the water you drink, or it could be from something else. Once the cause is treated, the symptoms will go away on their own.
Take-Home Message
- Mees' lines are white streaks that run across the nails. These are not something that just happens and should not be ignored.
- These can be a sign of a serious illness, such as arsenic poisoning, cancer, heart disease, or kidney failure.
- If you see lines like this on your nails, don't be afraid or worried about it, but see a doctor immediately for advice.
- The treatment does not treat the white line itself, but the underlying condition that caused it. When the condition is cured, the lines will disappear along with the nail's growth.
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