It is possible to get an onychomycosis from a fingernail. If the tissue around the fingernail breaks down, it is possible for external bacteria to enter the tissue, which can lead to onychomycosis. After the clinical appearance of onychomycosis, the nail groove and the surrounding tissues will appear red and swollen, and the patient will feel pain and localized pressure pain. If the inflammation develops further, an abscess may form, the pain and redness will expand, and a fluctuating sensation can be detected on palpation. After the diagnosis of onychomycosis, anti-inflammatory treatment must be timely, either oral antibiotics, or topical anti-inflammatory ointment. If an abscess is formed, in addition to anti-inflammatory treatment, surgical treatment is also needed, usually refers to abscess incision and drainage, the wound can not be sutured, and need to be changed regularly until the wound heals.