Polyonychia also known as supernumerary nails is a condition in which two or more nails grow in the same finger or toe. Signs and symptoms
The signs/symptoms of polyonychia are very easy to detect: two or more nails growing on the same finger or toe. The nails can either be separate, small nails (micronychia) or one wide, almost complete nail, the digit affected could also be wider than normal

Causes
Polyonychia is generally caused by a congenital duplication of the distal phalange of the affected digit(s), this can be caused by congenital factors (sporadic without a genetic link) or by genetic factors (sporadic or familial with genetic link). It can also be caused by polysyndactyly, which is characterized as one normal digit being connected/webbed (syndactyly) to an extra digit (polydactyly). Polyonychia can also be acquired, such as after an accident that affected the nail bed causing it to split. This type of polyonychia is just referred to as "post-traumatic split nail" Polyonychias syndromic causes include:

Isolated congenital onychodysplasiaPolyonychias non-syndromic causes include:

Polyphalangism (more specifically of the distal phalange)
Polysyndactyly

See also
Polydactyly
Syndactyly
Polysyndactyly


== References ==
Clotrimazole/betamethasone dipropionate, sold under the brand name Lotrisone among others, is a topical medication used for the treatment of fungal infections of the feet, groin, and body in people 17 years of age and older. It is a combination of clotrimazole and betamethasone dipropionate. It is applied to the skin.Common side effects include paresthesia, rash, edema, and secondary infections.In 2019, it was the 366th most commonly prescribed medication in the United States, with more than 600 thousand prescriptions. Medical uses
Clotrimazole/betamethasone dipropionate is indicated for the topical treatment of symptomatic inflammatory tinea pedis, tinea cruris, and tinea corporis due to Epidermophyton floccosum, Trichophyton mentagrophytes, and Trichophyton rubrum in people 17 years of age and older. Society and culture
Legal status
Clotrimazole/betamethasone dipropionate cream was approved for medical use in the United States in July 1984, and the lotion was approved for use in the United States in December 2000. References
External links
"Betamethasone dipropionate mixture with Clotrimazole". Drug Information Portal. U.S. National Library of Medicine. "Betamethasone Topical: MedlinePlus Drug Information". MedlinePlus. "Clotrimazole Topical: MedlinePlus Drug Information". MedlinePlus.