* Active fungal infections (Onychomycosis): Thickened, discolored, or brittle nails are signs of a fungal infection. Manicuring over a fungal infection can spread it to other nails or individuals.
* Bacterial infections (Paronychia): Redness, swelling, pain, and pus around the nail indicate a bacterial infection. Manicuring can exacerbate the infection.
* Viral infections (Warts): Warts around the nails are contagious and can spread during a manicure.
* Severe psoriasis affecting the nails: Nail psoriasis can cause pitting, thickening, discoloration, and separation of the nail from the nail bed. Manicuring can irritate the condition.
* Nail injuries: Open wounds, cuts, or severe trauma to the nail bed require healing before a manicure.
* Ingrown nails with infection: If an ingrown nail is infected, a manicure is not advisable.
It is essential to consult a healthcare professional for diagnosis and treatment before considering a manicure if any of these conditions are present. Additionally, a manicurist should refuse service if they observe any of these conditions to protect the client's health and prevent the spread of infection.