Sophia Delgado
Fingernails and toenails have always been a topic of fascination, with many wondering why fingernails seem to grow faster than toenails. While the exact reason remains uncertain, there are several theories and factors that influence nail growth, including age, sex, season, weather, diet, exercise, genetics, and health. One popular belief attributes the faster growth of fingernails to terminal trauma, suggesting that frequent use of the fingers leads to increased regeneration by the body. Another theory links nail growth to proximity to the heart, assuming that better circulation results in quicker growth. Additionally, factors like frequent nail clipping, lifestyle, and nail care routines can also impact the growth rate.
| Characteristics | Values |
|---|---|
| Reasons for nail growth | Nails grow due to new cells emerging from beneath the base of the nail under the cuticle |
| Factors affecting nail growth | Age |
| Time of year | |
| Circulation | |
| Trauma to the nail | |
| Frequency of nail clipping | |
| Nutritional deficiencies | |
| Hormones | |
| Pregnancy | |
| Lactation | |
| Puberty | |
| Medical conditions | |
| Genetics | |
| Use of the dominant hand |
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What You'll Learn
Fingernails grow faster than toenails
One factor is the amount of blood supplied to the nails. A popular theory suggests that fingernails grow faster because they are located closer to the heart and thus receive more blood. This theory is supported by studies that show fingernails and toenails grow fastest during the summer when our circulation is best. Additionally, blood circulation tends to slow down as we age, which may contribute to the decrease in nail growth rate over time.
Another factor influencing nail growth rate is the frequency of use of the fingertips. An experiment conducted by dermatologist Rodney Dawber found that the growth rate of a fingernail on his splinted finger was 25% slower than when the splint was removed. This suggests that the more a fingertip is used, the faster the nail grows. This could explain why nails on the dominant hand tend to grow faster, as they are used more frequently.
Hormones can also affect nail growth rates, with pregnancy being a significant factor. Nails are known to grow faster during pregnancy, possibly due to increased hormone levels. However, during lactation, nail growth rates decrease. Puberty is another period of hormonal changes that can affect nail growth, with nail growth peaking during this time and then declining as hormone levels stabilize.
While the exact reasons for the difference in growth rates between fingernails and toenails remain unknown, it is clear that a combination of factors, including blood circulation, fingertip usage, and hormonal influences, play a role in nail growth.
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Fingernail growth and health
Fingernails are made up of layers of the protein keratin and grow from beneath the base of the nail under the cuticle. As new cells grow, older cells become hard and compacted and are eventually pushed out toward the fingertips. Healthy nails are smooth, without ridges, grooves, spots or discolouration.
There are a number of factors that affect how fast your nails grow. Firstly, the time of year and age impact nail growth. Fingernails grow fastest at about age 10, then slow down over a person's lifetime. Nails also grow faster during the summer when circulation is best. Hormones can also play a role, with pregnancy and puberty increasing nail growth. Outside of these periods, hormone levels balance out, and nail growth slows.
The speed at which nails grow is also impacted by how often a fingertip is used. Nails on the dominant hand and longer fingers grow faster, as they are used more frequently. This increases the risk of trauma, which can slow nail growth. Trauma causes the body to send more blood and nutrients to the injured area to help repair it. Nails also grow faster on the dominant hand as these fingers are used more frequently.
Nail health can be improved by practicing good nail hygiene and taking biotin supplements, which increase nail strength and growth rate. Colour changes could indicate an underlying health condition, such as lung disease, skin cancer, kidney problems, or rheumatoid arthritis. Other changes in nail appearance, such as curving, thickening, or pitting, can also signal potential health issues.
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Fingernail growth and trauma
Fingernails are made up of layers of the protein keratin and grow from beneath the base of the nail under the cuticle. As new cells grow, older cells become hard and compacted and are eventually pushed out toward the fingertips. Fingernails usually regrow completely in about two months, while toenails take about four months.
Trauma to the nail can lead to temporary or lasting changes in nail growth, from discoloration to irregularities. Minor injuries can cause noticeable alterations, such as stubbing your toe, catching your finger in a door, or hitting your nail on a hard surface. Severe trauma, such as crushing injuries or deep cuts, may result in long-term or permanent effects if the nail matrix is significantly damaged. After an injury, it’s common for nails to show temporary changes as they heal, such as bruising, ridges, or a rough surface. These typically resolve over time as the damaged nail grows, allowing new, healthy cells to replace the affected area.
The extent of these changes often depends on factors like the severity of the nail injury, the depth of the trauma, and the area affected. Damage to the base of the nail near the cuticle is more likely to cause significant changes than a crack at the tip. Repeated trauma to toenails, caused by ill-fitting shoes, can lead to deformities in the nails. The deformities may resemble a fungal infection, with nails thickened or discolored and lifting away from the nail bed.
Treatment depends on the severity of the nail injury and the specific changes in nail growth. Minor trauma may heal without intervention, but keeping the area clean can promote recovery. When trauma results in significant changes or causes pain, it is recommended that you seek help from a board-certified dermatologist. Severe cases might require trimming damaged sections, draining blood from under the nail, or even surgical procedures if removal is necessary. While the nail may eventually return to its original appearance, cases with profound matrix damage could need ongoing care or reconstructive approaches.
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Fingernail growth and age
Fingernails grow from beneath the base of the nail under the cuticle. As new cells grow, older cells become hard and compacted and are eventually pushed out toward the fingertips. The speed of this process is determined by a variety of factors, some of which are outside of our control, such as age, genetics, and the time of year.
Nail growth is fastest at about age 10 and then slows down over a person's lifetime. This is because blood circulation slows with age. For example, Dr. William Bean observed that between the ages of 32 and 67, the growth rate of his left thumbnail dropped from 0.123 mm per day to 0.095 mm per day.
Hormones can also affect nail growth speed. For instance, pregnancy may speed up nail growth temporarily, while lactation may slow it down. Outside of pregnancy, puberty is usually when hormone levels are most tumultuous, with nail growth peaking during this time and declining as hormone levels balance out with age.
In addition to these factors, the growth rate of a nail depends on how often the fingertip is used. The nails on the dominant hand and the longer fingers grow faster, as they are used more frequently and are therefore more prone to trauma.
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Fingernail growth and hormones
Fingernails are made up of layers of the protein keratin and grow from beneath the base of the nail under the cuticle. As new cells grow, older cells become hard and compacted and are eventually pushed out toward the fingertips.
The growth of fingernails is influenced by the state of nutrition, endocrine factors, disease, and environmental factors. A study published by Fay Marnock et al. suggested that hormones passively diffuse into the nail from the capillaries in the blood as the nail's matrix builds up with keratin. The authors suggested measuring DHEA and cortisol in the nail to gauge hormone status over a prolonged period. This could have advantages over tests using serum, saliva, and urine, which reflect only a point in time or a single day's hormone level.
Dr. Thierry Hertoghe observes that vertical lines on fingernails are typical of a growth hormone deficiency. Some believe that this may also be a sign of nutrient deficiency. A telltale sign of menopause can be dry, brittle nails. Since estrogens are responsible for keeping water in body tissues, lowered estrogen levels contribute to less healthy fingernails. Dry, brittle nails are also a sign of hypothyroidism. With low thyroid function, circulation to the extremities is impaired, which means that the nutrients in the blood may not reach the fingernails. The nail bed can also become very pale because of poor circulation.
When you are chronically stressed, you will see a lot of changes throughout your body. It is common to experience digestive issues, insomnia, higher insulin, micronutrient deficiencies, and low progesterone, among other things, because your body is diverting important resources away from non-essential functions to ensure survival. When your levels of the stress hormone cortisol are high, your zinc levels get run down, and tiny white spots may appear on your fingernails.
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Frequently asked questions
There are several factors that affect how fast your nails grow. Firstly, the nails on your dominant hand tend to grow faster, as do the nails on your longer fingers. Nails also tend to grow faster during the day and in the summer, when circulation is best. Frequent nail clipping may also contribute to the illusion of faster nail growth.
Poor health can slow down nail growth. Conditions such as malnutrition, thyroid disease, and diabetes can impact nail growth. Age also plays a role, as nail growth is said to peak during puberty and then gradually slow down as hormone levels balance out.
Nail changes can indicate underlying health issues. For example, yellow nails can be a sign of lung disease, chronic bronchitis, or rheumatoid arthritis. Clubbing of the nails, where they curve more than usual, can indicate low oxygen levels in the blood and may be related to lung or heart disease. Washboard nails, which are grooves and ridges in the center of the thumb, can be caused by repeatedly picking or pushing back the cuticles.
