Liam Carter
Nail biting is a common habit, but it can cause trauma to the nails. Nails grow at a rate of about 0.13 inches per month, and toenails grow more slowly than fingernails. If the nail matrix is not damaged, the nail will typically regrow, but this process can take 3-6 months. If the nail matrix is damaged, the growing nail plate may contain defects, and significant damage can result in a permanently deformed nail.
| Characteristics | Values |
|---|---|
| Nail regrowth time | 2-6 months for fingernails, 4-6 months for toenails |
| Nail growth rate | Fingernails: 0.1-0.13 inches per month; Toenails: half the rate of fingernails |
| Factors affecting nail growth | Nail matrix damage, nail bed damage, peripheral artery disease, eczema, psoriasis, subungual melanoma, medication, and illnesses like COVID-19 or pneumonia |
| Nail trauma causes | Blow to the nail, nail biting, cuticle biting, ill-fitting shoes, accidental tearing or splitting, splinters, and repetitive trauma |
| Nail trauma treatment | Relief of pressure by draining blood trapped under the nail, medication, and minor surgical procedures |
| Nail growth promotion | Well-rounded diet, good general health, and properly fitted shoes |
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What You'll Learn
Nail biting can cause nail trauma and infections
Nail biting, or onychophagia, is a common habit, especially among children, with 25-35% of them biting their nails. While it is a benign behaviour for some, it can be a deeply ingrained self-mutilative behaviour for others. Nail biting can lead to nail trauma and infections, with several harmful consequences.
Nail biting can cause nail trauma, which can result in permanent nail deformities. Blunt force trauma can cause bleeding between the nail and the nail bed, resulting in a painful subungual haematoma. If the nail is completely detached, it cannot be reattached. Nail biting can also cause infections, such as paronychia, which is a bacterial or fungal skin infection that develops around the nail. Bacteria enter the skin through cuts in the cuticle and nail fold, causing inflammation and infection. Staphylococcus aureus and Streptococcus pyogenes are common bacterial causes of paronychia.
Paronychia can also be caused by nail-biting habits, frequent manicures or pedicures, accidents, and exposure to water or chemicals. Symptoms of acute paronychia appear within hours or days and can be treated with antibiotics. Chronic paronychia has a slower onset, lasting six weeks or longer, and may require antifungal medication. Home remedies for paronychia include soaking the affected area in warm water and applying lemon and salt.
To prevent nail biting, one can keep their nails trimmed and maintain proper hand and nail hygiene. Identifying triggers and managing them is also essential in breaking this habit. Keeping the hands busy with fidget devices or stress balls can help distract the mind from nail biting. In addition, dental deterrent devices can prevent the front teeth from damaging the nails and cuticles, helping to break the habit.
Overall, nail biting can have several negative consequences, including nail trauma and infections. It is important to address this habit and take preventive measures to ensure nail health and overall well-being.
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Toenails take longer to grow back than fingernails
A chewed-off nail will eventually grow back, but the time it takes depends on whether it was a fingernail or toenail. Nails grow a bit more than one-tenth of an inch per month and require 3-6 months to completely regrow. Toenails, in particular, can take up to a year and a half to grow back.
Fingernails grow at a rate of 0.13 inches per month, while toenails grow at about half that rate, at an average of 1.62 mm per month. Fingernails typically regrow entirely in 2 to 6 months, whereas toenails can take about 3 to 4 months.
The difference in growth rate between fingernails and toenails can be attributed to two main factors: "
Additionally, the rate of nail growth is believed to be directly proportional to the amount of blood flowing through the digit. Since the hands are closer to the heart than the feet, there is more blood flow to the fingers, contributing to faster fingernail growth. This theory also explains why nails tend to grow slower in cold weather when blood flow is restricted.
It's worth noting that nail growth can also be influenced by other factors such as age, nutrition, season, and individual genetics. Well-rounded diets and good general health promote stronger nail growth. Additionally, nails on the dominant hand tend to grow faster, and fingernails grow more rapidly during the summer.
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Severe nail injuries can cause your nail to fall off
A severe nail injury can cause your nail to fall off, but it will usually grow back with proper medical care. The nail matrix, the "factory" where your body produces new nails, can be damaged by a severe injury, causing some or all of the nail to stop growing back. However, it is rare for the nail matrix to be permanently damaged. Once the nail matrix heals, the nail will typically start growing again, although it may take several weeks for the new nail to become visible.
Nail injuries can cause noticeable damage until the nail grows out. Fingernails typically regrow entirely in two to six months, while toenails can take three to four months. If the injury includes the base of the nail, some cosmetic changes may be permanent. Nails grow at a rate of about one-tenth of an inch per month, and a well-rounded diet and good general health promote stronger nails.
Injuries to the nail can result in bleeding between the nail and the nail bed, a condition called subungual hematoma. This can be very painful, but the pressure can be relieved by drilling a tiny hole in the nail plate to release the accumulated blood. Blunt trauma to the nail can also cause the nail to detach entirely from the finger or toe, and there is no way to reattach it. If there is damage to the nail bed or adjacent tissues, it should be assessed by a physician for repair.
Illnesses such as severe eczema, COVID-19, or pneumonia can also interrupt nail growth and cause cosmetic changes such as horizontal ridges or lines. Certain medications, including chemotherapy, can also affect the nail matrix, leading to slow nail growth and colour changes. Additionally, habits such as nail biting and cuticle biting can cause trauma to the nails, increasing the likelihood of nail injury.
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A detached nail cannot be reattached
A detached nail will grow back as long as there is no permanent damage to the nail matrix or nail bed. The nail matrix is the "factory" where new nails are made, and it can be damaged by a severe injury, such as blunt trauma to the nail, or by certain illnesses. If the nail matrix is damaged, the growing nail may contain defects, and significant damage can result in a permanently deformed nail.
If the entire nail is detached from the finger or toe, it cannot be reattached, repaired, or replaced. However, with proper medical care, a nail that has fallen off will usually grow back. Nails grow at a rate of about 0.1 inches per month, and it can take 3-6 months for fingernails to completely regrow and 4 months for toenails.
To promote nail growth, it is important to maintain a well-rounded diet and good general health. Additionally, wearing properly sized shoes can help prevent toenail trauma, as nails can be injured when they are levered off the nail bed or run into the end of an athletic shoe. Avoiding habits such as nail biting and cuticle biting can also help prevent nail trauma and infections.
If there is bleeding between the nail and the nail bed, a doctor can perform a minor surgical procedure to relieve the pressure by drilling a tiny hole in the nail plate. This condition is called a subungual hematoma and can be very painful. In some cases, an X-ray may be necessary to determine if there is any bone damage.
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Proper medical care can help nails grow back
A chewed-off nail can grow back, provided there is no permanent damage to the nail matrix or nail bed. Nails grow at a rate of about 0.13 inches per month, with toenails growing at almost half the rate of fingernails. Typically, fingernails take 3-6 months to regrow completely, while toenails can take about 4 months.
One common nail injury is a subungual hematoma, which is caused by blood accumulating under the nail, often due to blunt trauma. This can be quickly relieved by a doctor drilling a tiny hole in the nail plate to release the pressure. Another procedure, called nail trephination, can also be performed to drain the trapped blood and relieve pain. This procedure must be carried out within 48 hours of the injury.
Additionally, certain conditions such as severe eczema, psoriasis, and subungual melanoma can affect the nail matrix and interfere with nail growth. It is important to seek medical care if you notice any color or texture changes in your nails, as these may be indicative of a nail matrix problem. Prescription medications, injections, or topical treatments may be recommended to manage these conditions and promote healthy nail growth.
Overall, with proper medical care and time, nails can grow back healthily after being chewed off, provided there is no permanent damage to the nail matrix or nail bed.
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Frequently asked questions
Yes, nails typically grow back unless there is permanent damage to the nail matrix or nail bed.
Nails grow at a rate of about 0.13 inches per month. Fingernails typically regrow in 2-6 months, while toenails take about 4 months.
A well-rounded diet and good general health promote strong nails. Keeping your fingernails trimmed and avoiding nail biting and cuticle biting can also help prevent nail trauma.
Nail matrix damage can cause bruising, ridges, discolouration, dents, and horizontal lines. If the nail matrix heals normally, deformities will disappear as the nail regrows.
