Noah Sinclair
Fingernails and toenails are made of a protein called keratin, which is also found in hair and skin. Nails grow back after being damaged or lost, thanks to the nail matrix — a special tissue that produces new nail cells. The nail matrix is located beneath the cuticle at the base of the nail, and it's usually not permanently damaged, even when the nail is lost. However, severe damage to the nail matrix can affect how nails grow back, and sometimes nails may not grow back at all. Nails grow slowly, with toenails taking longer than fingernails.
| Characteristics | Values |
|---|---|
| Time taken for fingernails to grow back | 4-6 months |
| Time taken for toenails to grow back | 6 months to 2 years |
| Factors affecting the speed of nail growth | Age, climate, season, hand dominance, trauma or injury, overall health, pregnancy, and hormones |
| Reasons for nails falling off or becoming loose | Trauma, fungal infection, skin conditions, chemicals, medicines, severe illnesses, and injury |
| Part of the nail responsible for its growth | Nail matrix |
| Composition of nails | Keratin, a type of protein |
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What You'll Learn
- Nails grow back slowly, requiring up to 6 months for fingernails and 18 months for toenails
- The nail matrix is the factory where new nails are made, and injuries can affect nail growth
- Nail bed injuries are common, and nails may separate or fall off due to trauma or infection
- Toenails are susceptible to fungal infections, which can cause discolouration, brittleness, and thickening
- Overall health impacts nail growth, with slower growth observed in older adults, colder climates, and illness
Nails grow back slowly, requiring up to 6 months for fingernails and 18 months for toenails
Nails have a good regeneration capacity, but they grow back slowly. Fingernails may grow at a rate of about one-tenth of a millimetre each day, so it can take up to six months for a completely removed fingernail to grow back. Toenails may grow at about half or a third of the rate of fingernails, so it can take up to 18 months for a completely removed toenail to grow back.
Several factors can affect the speed of nail regrowth. Nails tend to grow slower in older adults and in colder climates. Nails grow faster in the summer, and the nails on the dominant hand tend to grow faster than those on the non-dominant hand. Trauma or injury can increase the rate of regrowth due to increased blood flow to the injured area. Overall health also impacts nail growth, which can slow down if a person is sick or malnourished. Hormones also affect regrowth, so nails might grow quicker during pregnancy.
The nail matrix is the "factory" where the body makes new nails. It includes the germinal matrix, which produces most of the nail plate, and the sterile matrix, which aids in anchoring the nail to the skin. The nail bed lies beneath the nail plate and contains blood vessels that nourish the growing nail. The nail matrix is made of special cells that continuously generate new cells, pushing older cells forward until they harden into the nail plate. As long as the nail matrix is healthy, nails will continue to grow. However, injuries and certain health conditions can damage the nail matrix and interfere with nail growth.
Home treatment can help relieve pain, promote healing, and prevent infection when a nail is damaged. Treatment may involve removing the nail, keeping the area dry, and waiting for a new nail to grow. The nail bed should be kept clean and covered with petroleum jelly and an adhesive bandage until the nail has grown back.
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The nail matrix is the factory where new nails are made, and injuries can affect nail growth
The nail matrix is a powerhouse of nail growth located beneath the cuticle at the base of your nail. It is often referred to as the "factory" where new nails are made. The nail matrix is made up of two parts: the germinal matrix, which is responsible for producing most of the nail plate, and the sterile matrix, which helps to anchor the nail. The nail matrix is responsible for creating new cells that become your fingernails or toenails. About 90% of nail growth comes from the germinal matrix, while the remaining 10% comes from the sterile matrix.
Injuries and certain health conditions can damage the nail matrix and affect nail growth. Minor damage to the nail matrix can temporarily change the appearance of the nail, while severe injuries can cause the nail to fall off. In cases of severe nail matrix damage, the nail may not grow back at all. However, with proper treatment and care, the nail matrix can heal, and nail growth can resume. This process can take several weeks to months, depending on the severity of the injury.
The lunula, the white crescent shape at the base of the nail, is the only visible part of the nail matrix. It is important to note that some people do not have visible lunulas, which is also normal. The rest of the nail matrix remains hidden beneath the proximal nail fold, performing its crucial function of nail growth.
Overall health can also impact nail growth. For example, nail growth may slow down if a person is sick, malnourished, or experiencing reduced blood flow to the hands and feet due to aging or disease. Additionally, trauma or injury can increase the rate of nail regrowth due to increased blood flow to the injured area.
In summary, the nail matrix plays a crucial role in nail growth, and injuries or health conditions that affect the nail matrix can impact the growth and appearance of nails. With proper treatment and care, nail growth can often resume, but it is important to seek medical advice for severe or persistent issues.
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Nail bed injuries are common, and nails may separate or fall off due to trauma or infection
Nail bed injuries are common, and they often occur when a heavy object crushes or hits the fingers or toes, or when a person sustains a cut from a sharp object like a knife or saw. These injuries can be very painful, and the blood accumulating beneath the nail can put pressure on the tender skin of the nail bed. In some cases, the nail may lift away from the nail bed or separate from it entirely. This separation can also be caused by severe or repetitive stubbing of the toe, which is common in athletes who wear tight shoes.
Fungal nail infections can also cause nails to separate from the nail bed. Toenails are more commonly affected by these infections than fingernails, and symptoms include cracked, yellow, discoloured, streaked, thickened, or spotted nails. Skin conditions, such as psoriasis, and chemicals, such as acrylic-based gel polishes, can also lead to nail separation. Certain medicines, such as chemotherapy or antibiotics, and severe illnesses may also be factors.
If a nail separates from the nail bed, it will not reattach. The nail bed should be kept dry, clean, and covered with petroleum jelly and an adhesive bandage until the nail has grown back. It is important to watch for signs of infection, such as increasing heat, redness, pain, tenderness, swelling, or pus. If an infection is left untreated, it can lead to serious problems, such as foot ulcers.
Minor nail bed injuries often heal on their own, but more severe injuries may require medical treatment to ensure proper healing and prevent deformities. Full recovery may take 6 to 9 months, depending on the severity of the injury. In cases of severe nail matrix damage, some or all of the nail may not grow back. However, with proper medical care, nails usually grow back, although it may take up to 6 months for fingernails and 18 months for toenails.
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Toenails are susceptible to fungal infections, which can cause discolouration, brittleness, and thickening
Toenails are particularly vulnerable to fungal infections due to their constant exposure to damp environments, such as swimming pools, locker rooms, and showers. Additionally, those who wear closed shoes for extended periods, such as athletes or individuals with a history of athlete's foot, are more prone to creating the warm, damp conditions that fungi thrive in. This can lead to fungal infections, which are spread from person to person and can cause discolouration, thickening, and brittleness of the nail.
Fungal nail infections, or onychomycosis, occur when fungi invade the nail and the skin underneath (nail bed). Toenails are more commonly affected than fingernails, and symptoms can include cracked, yellow, streaked, thickened, spotted, or white nails. The nail may also become brittle and crumbly, and in some cases, the whole nail can lift off, causing the surrounding skin to become swollen and painful.
The infection often spreads to the entire nail, and severe cases may require nail removal. Nails are slow to grow back, with toenails taking up to 18 months to fully regenerate. During this time, proper wound care is essential to prevent further infection. Keeping the wound clean and dry and following your physician's instructions for medication and wound dressing are crucial steps in the healing process.
To prevent fungal nail infections, maintaining proper hygiene and regular foot inspection are important. Cleaning your feet with soap and water, ensuring they are thoroughly dried, and wearing shoes that fit well and are made of breathable materials can help reduce the risk of infection. Additionally, wearing shower shoes in public areas and changing socks or hosiery frequently can also help keep your feet healthy and fungus-free.
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Overall health impacts nail growth, with slower growth observed in older adults, colder climates, and illness
Overall health has an impact on nail growth, with older adults, people living in colder climates, and those with illnesses observing slower growth. Ageing affects the growth rate, texture, thickness, shape, and colour of nails. From as early as 20 years old, the growth rate of nails slows by about 0.5% per year. Nails may become brittle and prone to breaking, and repeated exposure to water, harsh cleaning chemicals, or cosmetics can worsen this problem. Diseases may decrease blood flow to the hands and feet, slowing nail growth.
In colder climates, slower nail growth may occur due to constricted blood vessels and reduced circulation. Nails can become dry, brittle, and more prone to breakage. Conversely, warmer climates promote faster nail growth due to increased circulation and higher humidity levels.
Illnesses and injuries can also damage the nail matrix and affect nail growth. Severe illnesses, such as kidney, liver, and endocrine disorders, can cause dramatic shape changes in nails, such as clubbing, which is a sign of long-term oxygen deprivation. Conditions like anaemia, hardening of the arteries, and hormonal problems can cause changes in nail texture. Fungal infections, which are common in older individuals, can cause nail thickening and discolouration.
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Frequently asked questions
Nails grow back because of the constant production of new nail cells in the nail matrix, which is the root of your nail.
Fingernails typically take 4-6 months to grow back, while toenails can take up to 18 months.
Nails tend to grow slower in older adults, in colder climates, and when the person is sick or malnourished. Nails grow faster in the summer, during pregnancy, and on the dominant hand.
If you lose a nail, keep the nail bed dry, clean, and covered with petroleum jelly and an adhesive bandage until the nail has grown back. Watch for signs of infection such as increasing heat, redness, pain, tenderness, swelling, or pus.
Nail loss is commonly caused by trauma or injury, such as dropping something heavy on your foot, stubbing your toe, or wearing tight shoes. Maintaining good nail care practices and wearing appropriately fitted footwear can help reduce the risk of nail loss.
