I have spider veins. It is not common in my age but is something mostly as people grow older. I have heard that vitamin K might help minimize spider veins. Spider veins are a type of varicose vein that occurs on the legs. Actually there quite a lot of women who get them in their 20s.
Treatment includes laser surgery or sclerotherapy, which saline is injected into the vein.
Black toenails often occur due to trauma or vigorous rubbing of the foot. It represents blood that has developed under toenail. It is harmless, but not cosmetically appealing. I've had patients who remove the blood themself by taking a paper clip, heating it, and pushing it through the toenail. Alternatively, you can have a physician look at it to have it removed.