Shift your free hand to the top of your belly and slide it down the side to feel for the baby's back. If that side is smooth and has even resistance to pressure, that's the back. If you can press in further, it's uneven and you feel a lot of movement, that's the front of the baby.
Dark Skin â If you have dark skin (African American or black people) it is not uncommon to have tan or dark lines running down your fingernails or toenails. Thought the possibility for cancer should not be ignored. Fungus â A fungal nail infection can cause discoloration of fingernails and toenails. Toenail fungus can cause the nail to appear dark even black. Often though there will be other shades of yellow and green associated with fungus.
My Toenail Hurts: What Causes Runners Toenails to Fall Off? According to a 2004 review article by E.A. Mailler and B.B. Adams, the cause of black or blue toenail from running is rooted in the repeated impacts that occur with each step. After the initial impact with the ground, there is a brief moment where your shoe has come to a stop but your foot inside of it has not. Your foot slides forward, usually only by a small amount, but this causes your toenails to take the brunt of the impact with the toebox of your shoe.