Never!

Hi there, I have read in "A Dream of the Red Mansions" (a Qing Dynasty/19th century Chinese novel) that bright red impatiens were used by women to colour their finger nails. According to one passage in the book, apply the crushed flowers generously on the nails and leave them in place for "a while," then carefully remove the flowers. The finger nails "will be stained." I haven't tried this so let me know if it works ;-) Have fun!

Depending on how ambered the finish is, its probably going to require bit of tinting. Which usually takes a professional to get it just right, but if you are patient and willing to experiment you can usually get pretty close. So you will want to sand the area with 100grit paper, hand sand, no machines. then apply one coat of polyurethane straight. no tint. let that dry. scuff the area with 150-180 grit, clean and apply a second coat of poly. this is usually where i will try to tint. you will probably want a yellowish tint. not bright yellow, more a darker yellow. since the area is small...get a dixie cup, fill about halfway with poly, and litterally only 1 drop of the tint. mix well and apply a light coat, and this is where your eye has to come into play. take a look, if its not enough tint, add one more drop...Only add a drop at a time, the tints are powerful and can become wasted if adding too much (hence why only using a dixie cup too) once you think you got it, let it dry and then ever sooo slightly scuff a little bit, not too much or you will remove the tint. then add one more light coat of regular polyurethane. make sure you feather out the strokes to help blend with the existing floor. you may notice the repair for a little while but after normal traffic hopefully it will blend nicely.

Have a doctor look at it. If it's a fungus he will prescribe something for it but it may not be a fungus. My husband had what he thought was fungus under the nail on 1 finger. He fooled around with it for months and wouldn't see a doctor dispite my constant nagging.until it One day he banged it and danced around in pain. Frustrated I hollered at him for cripes sake see a doctor. I also told him I didn't feel the least bit of sympathy for him because he was too stupid and stubborn to look after his health and then I cried. I think it was the crying that got through to him because he immediately made an appointment. It turned out it wasn't fungus but cancer and he lost part of his finger. When he told me I bit my tongue--you don't kick a guy when he's down but I would have dearly liked to swat him upside the head