Essa infecção bacteriana está quase sempre associada à levantamento de um revestimento de unha from the nail plate allowing bacteria and other pathogens to invade the space. It is probably a pseudomonas bacteria and is also known as chloronychia or green nail syndrome.
Veja o artigo completo para cloroníquia ou o artigo sobre como tratar síndrome da unha verde.
Tratamento adequado e recobrimento após infecções nas unhas
In any case, the way to go is to remove the coating and seek medical advice. Once a correct diagnosis has been established, then a range of therapies are available which include avoidance of moisture, topical acetic acid/hypochlorite soaks (vinegar/bleach), antibiotics, and others.
The doctor will be able to prescribe the most suitable one. Only apply a new coating once the treatment has been successful, the infection detained, and the “greenie” has grown out.

