Depends: It may depend on what color your natural skin color is. Some dark skinned individuals have dark gray streaks in their toenails fingernails. However there are other causes of it which may include a hematoma or melanoma or fungal infection. Have your podiatrist check it out.
Answered 5/11/2018
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Could be fungus: It could be a fungal infection in the toenails. However, without seeing the toenails it is difficult to diagnose. I recommend you ask a podiatrist or dermatologist to examine the toenails.
Answered 11/26/2017
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