Beginner in Game Development, Which Engine Should I Use? Comparison of Unity vs Unreal vs Godot (Focusing on Free Engines) Choosing a Game Engine: Know This First: 5 Key Q&A Q1. What is a Game Engine? Is it necessary to use one? A. Think of a game engine as a set of development tools that bundles essential functions required for making games, similar to a car engine. It includes features like rendering graphics on-screen ( Rendering ), physics effects for characters colliding with walls or jumping ( Physics Engine ), and playing background music or sound effects ( Audio System ). While it's possible to create a game from scratch without an engine, it requires an immense amount of time and effort, which is why most developers today use game engines, especially beginners! Q2. I want to start game development; are there any good free engines available? A. Yes,...
More Than 10 Signs Your Nails Are Sending: What to Look For and When to See a Doctor
Nail Health: What You Need to Know First: 5 Key Q&A
Q1. Can I diagnose a disease just by looking at the shape of my nails?
No, that's not the case. Changes in your nails are merely 'clues' or 'signals' sent by your body, and cannot definitively diagnose a disease on their own. Accurate diagnosis must be made through a doctor's examination and necessary tests.
Q2. Is it okay if only one or two nails look strange?
Yes, that's quite likely. Changes appearing on just one or two nails are often due to external stimuli such as bumps, nail-biting habits, or contact with specific chemicals. If similar changes appear symmetrically on multiple nails, it may indicate a systemic health issue.
Q3. Will taking supplements like biotin make my nails healthier?
If a specific nutrient deficiency is identified, it may help. However, in most cases, supplements alone may not be very effective. High doses of biotin can also distort blood test results related to the thyroid or heart, so it's safest to consult a doctor before taking them.
Q4. When do changes in nails reflect health status?
Nails grow very slowly, about 0.1mm a day or 3mm a month. Therefore, the abnormal signals you see in your nails now may actually be traces of events that occurred in your body weeks or months ago.
Q5. I'm confused about whether to go to a dermatologist or an internist.
Good question. If you suspect issues with the nails themselves, such as nail fungus or inflammation around them, it's best to visit a 'dermatologist.' However, if there are common changes across all nails and other systemic symptoms like shortness of breath or swelling are present, it's advisable to first consult an 'internist' or 'family medicine' doctor for a comprehensive evaluation.
Our hands are the most familiar part of our bodies that we encounter dozens of times a day. Yet, we often overlook the small changes that appear at the tips of our nails while trimming or painting them. Nails are not just decorations; they serve as a small mirror reflecting our internal health. Sometimes they record our nutritional status, sometimes clues to hidden diseases, and sometimes significant past health events. Today, we will learn how to read this small mirror properly, by understanding more than 10 signals our nails send, allowing us to listen to our body's voice.
Abnormal Nail Shapes: What Should You Look For?
The most noticeable changes are in the shape of the nails. Any unusual shape may signal a change occurring somewhere in your body.
Spoon Nail: The center of the nail dips in like a spoon, while the edges curl up. The most common cause is 'iron deficiency anemia.' When the body lacks iron, the proteins that strengthen the nails weaken, causing them to sink in the middle like thin plastic. If you also experience dizziness or fatigue, it's advisable to get a blood test.
Digital Clubbing: The tips of the fingers swell roundly, and the nails bulge outward. If there is no diamond-shaped gap between the nails when you touch the fingertips together, this could be a concern. This is closely related to chronic oxygen deficiency, which can signal chronic lung diseases like pulmonary fibrosis or congenital heart diseases. If you experience symptoms like shortness of breath, be sure to seek medical attention.
Warnings from Nail Color and Lines
The color or lines of your nails can be important clues to your body's metabolic state or specific diseases.
Terry's Nails & Lindsay's Nails: 'Terry's Nails' appear mostly pale white with only a pink band at the tip, which may be related to systemic diseases like cirrhosis, heart failure, or diabetes. 'Lindsay's Nails' have one half white and the other half brown or red, commonly observed in patients with chronic kidney disease.
Beau's Lines & Muehrcke's Lines: 'Beau's Lines' are deep grooves running across the nail. They appear weeks to months after experiencing severe fever, major surgery, or extreme stress, marking a temporary halt in nail growth. Similar white horizontal lines known as 'Muehrcke's Lines' may indicate poisoning from heavy metals like arsenic or severe systemic diseases.
Splinter Hemorrhages: These are thin red-brown vertical lines that appear as if a splinter is stuck under the nail. Most cases are due to minor trauma, but if they appear repeatedly on multiple nails without explanation and are accompanied by fever or palpitations, it could be a significant signal of an infection in the heart lining (infective endocarditis), requiring immediate medical attention.
Episode: Discovery by Kim Hyun-soo, a 40s Office Worker
Kim Hyun-soo, a 40s office worker who often felt fatigued, discovered one day that most of his nails had turned pale. It was 'Terry's Nails.' He tried to dismiss it as unimportant, but after his wife's insistence, he visited a hospital and was diagnosed with early-stage cirrhosis. "The small changes in my nails were warning me to pay attention to my health. I almost missed a serious issue."
Issues with Nail Surface and Surrounding Areas
The texture of the nails themselves and issues with the surrounding skin can also provide important clues.
Pitting: This is when the surface of the nail has small pits as if poked with a needle. It commonly appears in autoimmune diseases like psoriasis or alopecia areata. It's advisable to check for other symptoms on the scalp or skin as well.
Onycholysis: This occurs when the tips of the nails lift up from the underlying skin, appearing white. It could signal hyperthyroidism or may occur in individuals frequently exposed to water or chemicals, such as those with nail fungus or psoriasis.
Episode: Lee Ji-young's Health Diary
Lee Ji-young, a college student, noticed 'Beau's Lines' forming horizontally on several nails two months after taking a major exam. "I was worried that my nails had scars, but when I went to the hospital, the doctor asked if I had been very sick or under severe stress about two months ago. The timing matched perfectly with when I suffered from a high fever while preparing for the exam." She felt that her nails were like a small diary recording her health history.
In-Depth Exploration 1: Why Does Clubbing Indicate Problems with the Lungs and Heart?
Clubbing, where the tips of the fingers swell roundly, has long been recognized as an important medical sign. It’s sometimes referred to as 'Hippocratic fingers' because Hippocrates first described it. But why does this phenomenon occur when there are issues with the lungs or heart?
While not 100% clear, the most likely hypothesis is that it relates to 'chronic hypoxia.' When the oxygen supply to our body is compromised for a long time, due to conditions like pulmonary fibrosis or congenital heart disease, our body compensates by dilating blood vessels leading to peripheral tissues like the fingertips, releasing specific growth factors like vascular endothelial growth factor (VEGF). This causes abnormal proliferation of soft and connective tissues at the fingertips, leading to the rounded and bulbous shape. Thus, clubbing itself is not a disease, but a strong warning signal that there may be serious oxygen supply issues somewhere in the body.
In-Depth Exploration 2: Beau's Lines, A Health Diary Etched in Nails
Beau's Lines, deep grooves running across the nails, serve as a unique indicator that records our health history, much like tree rings. By looking at the location of these lines, we can roughly estimate when significant stress occurred in our bodies.
Nails grow from an area at the base of the finger called the 'nail matrix' at a rate of about 0.1mm a day. However, when we experience severe fever, major surgery, or extreme stress, our body temporarily shuts down non-essential activities like nail production to focus all energy on survival. This 'growth halt' moment is etched into the nails as deep grooves.
It takes about six months for a nail to grow from root to tip completely. If a Beau's Line is located in the middle of the nail, it indicates that a significant event occurred in the body around three months ago. Therefore, when doctors find Beau's Lines, they often ask, "Did you experience significant illness or stress a few months ago?" Nails serve as a mysterious archive that tells the story of our body’s past.
Home Care and Signs You Need to See a Doctor (FAQ)
Q. My nails are brittle and splitting. How should I care for them?
The most common cause is dryness due to frequent handwashing or using hand sanitizers. After washing your hands, be sure to apply moisturizer thoroughly, including the nails. It's also good to develop the habit of wearing rubber gloves over cotton gloves while doing dishes. A balanced diet is important as nutrient deficiencies like protein, iron, and zinc can weaken nails.
Q. I have a black vertical line on my nail, and I'm scared it might be melanoma.
Black lines on the nails (melanonychia) are usually benign pigmentations that are relatively common in people of Asian descent. However, if the line appears only on one nail, widens over time, shows irregular color, or spreads to the surrounding skin, it could be a sign of a type of skin cancer called 'subungual melanoma,' so it is essential to see a dermatologist.
Author Information: The content of this article has been compiled based on the clinical guidelines of reputable organizations such as the American Academy of Dermatology (AAD) and the American Academy of Family Physicians (AAFP), along with reviews from major medical journals, objectively outlining the signals of systemic diseases associated with changes in nails.
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