つめはくせん
爪白癬
Onychomycosis (a fungal infection of the toenails or fingernails)
爪が白癬菌に感染すること。最初は自覚症状がなく、進行すると爪が白く濁ってくることが特徴。
This is when the nails become infected with the Trichophyton fungus. At first there are no subjective (noticeable by the affected person) symptoms, and as the infection progresses, the nails characteristically become a cloudy white.