Nail Signs Green nail syndrome 绿甲综合征
Green nail syndrome
The yellow–green to green–black nail plate discoloration is due to the production of the pigments pyocyanin and pyoverdin by Pseudomonas aeruginosa. This discoloration is most often present in the subungual space created by onycholysis and less often in the lateral nail plate. Predisposing factors include prolonged exposure to water, use of detergents and soaps, nail trauma, and other causes of onycholysis or paronychia. Not surprisingly, this disorder is seen in barbers, dishwashers, bakers, and medical personnel.
Pseudomonas colonization can be eliminated from the nail surface by applying a few drops of 2% sodium hypochlorite solution (or household chlorine bleach diluted 1 : 4 in water) and from the subungual space by soaking the affected digits in the same solution for 5 minutes per day for 20–30 days. The underlying nail disorder must also be addressed, e.g. clipping back the detached nail plate if there is onycholysis.
绿甲综合征
黄绿色至黑绿色指甲板变色是由于绿脓假单胞菌产生的绿脓菌素所致。这种变色通常存在于由甲剥离产生的甲下空间中，并且较少出现在外侧甲板中。易感因素包括长期接触水，使用洗涤剂和肥皂，指甲创伤以及甲剥离或甲沟炎。毫不奇怪，这种疾病可常见于理发师，洗碗员，面包师和医务人员。
通过将几滴2％次氯酸钠溶液（或家用氯漂白剂在水中1：4稀释）和通过将受影响的手指浸泡在同一溶液中5分钟，连续20-30天，即可消除绿脓假单胞菌。还必须解决潜在的指甲疾病，例如如果存在甲剥离，则剪掉分离的指甲板。
Reference:
Antonella Tosti, Bianca Maria Piraccini. In: Jean Bolognia Julie Schaffer Lorenzo Cerroni, editors. Dermatology: 2-Volume Set 4th Edition. Elsevier; 2017. p1206-1207.
