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Green Nail Syndrome

By Wingfield E. Rehmus, MD, MPH

Green nail syndrome is infection with Pseudomonas, a type of bacteria.

Green nail syndrome is caused by an infection with Pseudomonas species. It usually develops in people who have onycholysis and whose hands are often in water. The nail in the area of onycholysis becomes greenish in color. The area can be treated by soaking in a 1% acetic acid solution (diluted vinegar) or an alcohol solution twice a day. Trimming back the nail also helps.

* This is the Consumer Version. *