Nail blaracing is a common problem that is most often found on the fingers of the lower extremities. The darkening of the nail plate may be caused by hemorrhage, or if we speak easier - bruises. Most likely, you just removed your finger in the nail bed area.
What if you did not injure the finger, and the nail still black? In this case, pay attention to shoes. If you recently acquired new boots and did not have time to spread them, then most likely they are the cause of hemorrhage. This usually happens with incorrectly selected shoes, which very compresses the fingers. The blood supply to the graduated areas is worsening, and capillaries appear. To avoid this, do not buy beautiful and fashionable shoes if it does not fit you. Some models are intended only for a narrow foot with a low lift. Often the blackening of the nail bed on the legs occurs due to silicone shoes. If you decide to buy silicone shoes, try on them in the evening when the leg is poured. Such shoes do not swear and does not acquire the shape of the leg.Very often, the nails turn black due to improper use of household chemicals. Therefore, clean the stove and toilet only need to wear gloves. It is desirable during operation not to mix several means, as they may react with each other. Normally, nails are black because of the use of iodine and potassium permanganate. Frequent coloring nails causes them to darken. To get rid of plaque dark enough to rub the plate sandind nail file and make the bath with lemon juice. If the build-up before the Wizard poorly crafted nail primer and degreaser, possibly under gel or acrylic nail plate darken.
The reasons may be different of course, but I was like, and it was a fungus, treated for a long time but of course pleased that the successful soap constantly feet soap and then smeared mizolom gel (ordered in the online store Fitomarket, there are cheaper)