Green nail syndrome, is a paronychial infection caused due to Pseudomonas aeruginosa that can develop in individuals whose hands are frequently submerged in water. It may also occur as transverse green stripes that are ascribed to intermittent episodes of infection.:272,791 Green nail syndrome, is a paronychial infection caused due to Pseudomonas aeruginosa that can develop in individuals whose hands are frequently submerged in water. It may also occur as transverse green stripes that are ascribed to intermittent episodes of infection.:272,791