Fingernail rot, should be treated according to the cause, such as onychomycosis, should choose antifungal drugs; onychomycosis, can be anti-infection treatment and surgical treatment. 1. Nail fungus: fungal infection caused by nail fungus can cause brittle nails, uneven nails, which may lead to rotten fingernails, you can use topical cyclopamine ketone ointment, amorolfine nail coating and other drugs for treatment, oral itraconazole capsules, terbinafine tablets and other antifungal drugs. 2. Nail Inguinitis: Bacterial infection causes a purulent inflammatory reaction around the nails, which may lead to the appearance of rotting fingernails. Mild cases can be treated with topical ichthyol ointment, mupirocin ointment and other medications, and if an abscess is formed, it can be incised and drained or surgical measures such as removing the nail can be taken. Fingernail rot, need to go to the hospital for examination, clear cause, symptomatic treatment, the above drugs need to follow the doctor’s instructions to use.