Yes. A claw toe deformity can cause increased pressure on the nail when walking and/or wearing shoes because of the altered position of the toe.
They can.. Since claw toes force you to walk on the tip of your toe instead of the pad where you're supposed to bear weight, it puts pressure on the nail and can cause thickening or other changes to the nail shape.
It can. Toe contractures can cause the nails to be more likely to be exposed to trauma leading to possible nail damage and increased risk of nail infection.
May be yes? Nail problems is not part of the clawing of the toes, the directions the toe take and the abnormal pressure apply to nail could cause nail problems?