Nail dystrophy - Clavus Dystrophy
https://en.wikipedia.org/wiki/Nail_disease
☆ In anno 2022 Stiftung Warentest ex Germania provenit, satisfactio consumptoria cum ModelDerm paulo minus fuit quam cum consultationibus telemedicinis solutis. 

Median nail dystrophy Non causatur contagione fungal.
relevance score : -100.0%
References
Trachyonychia and Twenty-Nail Dystrophy: A Comprehensive Review and Discussion of Diagnostic Accuracy 27843915 NIH
Trachyonychia, seu twenty‑nail dystrophy, significat ungues tenues et fragiles, cum multis iugis longitudinaliter decurrentibus. Aliquando, twenty‑nail dystrophy mendosa describitur aliae conditiones quae omnes viginti ungues afficiunt.
The term trachyonychia, also known as twenty-nail dystrophy, is used to describe thin, brittle nails with excessive longitudinal ridging. The term twenty-nail dystrophy has been incorrectly applied to other conditions that can affect all twenty nails.
Median nail dystrophy - Case reports 33318093 NIH
Vir XXXIV annos natus ad medicum regularem suum profectus est, quod massas sine dolore in utroque suo inguine per XX annos habuit. Non meminit unguis laesos aut tabes factas. In utroque pollice sulcus rectus per medium, similis abiete, cum lineis transversis, erat.
A 34-year-old man presented to his primary care physician with a 20-year history of painless bilateral thumbnail lesions. The patient had no history of nail trauma or infection. Both thumbs had a central linear depression in a fir tree pattern, surrounded by parallel transverse ridges.
Nail cosmetics: What a dermatologist should know! 37317711Cum clavi medicamenta fere tuta sint, adhuc possunt quaestiones excitare, ut reactiones allergicae, irritationes, infectiones, et problemata mechanica. Notandum est multos usus medicamentorum a cosmeticis, qui anatomiam et functionem unguis non intellegunt, potius quam a dermatologis, permovere. Accedit etiam cura hygiënica in salonibus ungularum et institutis pulchritudinis, quae in casibus acutis, ut paronychia et dystrophia unguis, ob laesionem matricis, oriuntur.
While most nail cosmetics are generally safe, they can still lead to issues such as allergic reactions, irritations, infections, and mechanical problems. It's worth noting that many of nail cosmetic procedures are carried out by beauticians who may lack proper knowledge of nail anatomy and function, rather than dermatologists. Additionally, the hygiene practices in nail salons and beauty parlors vary, which can result in acute problems like paronychia and nail dystrophy due to matrix injury.
Dystrophia unguis saepe misdiagnositur, ut onychomycosis, et curatur. Ante initium therapiae antifungalis, provisor sanitatis debet infectionem fungalem confirmare. Administratio curationis personarum sine contagione supervacua est; cura sanitatis et causae partium supervacuae sunt.
○ Curatio
Iniectio intralesionalis corticosteroidis tentari potest ad tractandum dystrophiam clavi.
○ Curatio OTC Medicamenta
Fugere actiones quae ungues laedere possunt, ut pediludium vel ambulatio montana. Curatio antifungalis inefficax est, quia onychodystrophia non causatur a contagione fungali.