What causes double toenail growth?
Isabella Harris
Updated on January 16, 2026
Double toenails, not to be confused with split toenails, are an inherited, genetic trait. In other words, no, you did not drop something on your toenail when you were a child, causing your nail to split permanently.
Why is my toenail growing an extra layer?
Toenails that grow thicker over time likely indicate a fungal infection, also known as onychomycosis. Left untreated, thick toenails can become painful. Prompt treatment can be key to curing the nail fungus. Fungal infections might be difficult to cure and may require months of treatment.How do you get rid of layered toenails?
Applying a small amount of melted coconut oil can help heal thick yellow toenails. You can purchase over-the-counter (OTC) antifungal nail creams and ointments. Be sure to clip and clean your nails before use to make sure the creams reach deeper layers. Laser therapy can be used to treat a fungal toenail infection.How common are double toenails?
A rudimentary accessory or double nail of the little toe is not rare, although only described three times before. Most cases are accidentally detected and only few patients seek help because they have discomfort or pain.Why do I have an overlapping toenail?
The cause of an overlapping toe may be hereditary or may develop as you get older. Overlapping toes are often associated with other foot issues, such as bunions and hammer toes. Follow up with your doctor as soon as you have pain or other symptoms from an overlapping toe.What To Do if Your Toenail Falls Off
What is a double toenail?
Split toenails will eventually grow back in one piece, whereas a double toenail will continue to grow back exactly the way it was. Double toenails are most likely the initial form of a hexadactyly (a sixth finger or toe). It is a recessive feature, so it may skip a few generations.Why do I have another nail growing under my nail?
Pterygium inversum unguis. Pterygium inversum unguis (PIU) occurs when the hyponychium attaches to the underside of the nail as it grows. It's an uncommon condition, but it's a common cause of skin overgrowth under the fingernail.Can a toenail grow under another toenail?
After a nail separates from the nail bed, it will not reattach, so don't try. In its place, a new nail will have to grow back. Toenail growth can be slow; toenails can take up to 18 months (1.5 years) to grow back.How do you get rid of accessory toenails?
Many people do not request or seek out removal, as the accessory nail typically does not cause symptoms. Surgical or chemical matricectomy, or complete removal or destruction of the nail matrix, has been used for successful removal of the accessory toenail.Why do I have one thick toenail?
Thick toenails are your body whispering that something is not right. Several causes result in developing thick toenails. The main cause is onychomycosis or fungal infection of the nails caused by dermatophytes (nail fungus). Physical trauma, Psoriasis,Lichen planus and diabetes may also cause thick nails to develop.What does Vicks VapoRub do for toenails?
Vicks VapoRubAlthough designed for cough suppression, its active ingredients (camphor and eucalyptus oil) may help treat toenail fungus. A 2011 study found that Vicks VapoRub had a “positive clinical effect” in the treatment of toenail fungus.