After playing the ball under the nail cover water is usually due to inguinitis, gray nails and other diseases, should go to the hospital in time for diagnosis and treatment, to avoid aggravation of the condition. 1. Infertitis: Infertitis is usually caused by infection of the nail edge, which can cause pain at the nail edge, localized or even under the nail abscesses can be formed, and pus can flow after the breakage of the phenomenon. You can use mupirocin ointment, erythromycin ointment and other medications as prescribed by the doctor, and if necessary, surgical incision of the abscess to drain the pus, and change the medication on a regular basis. 2. Gray nails: Nail infection with fungi can lead to the formation of onychomycosis, also known as gray nails, can appear under the nail accumulation of pus symptoms, can follow the doctor’s instructions for external use of amorphophallus hydrochloride ointment, cyclo-pyridonium cream and other antifungal drugs, pus accumulation is more can be surgically incised to drain the pus. If the condition persists, it is recommended to go to the hospital for consultation and treatment.