A member asked:

I have vertical black lines in my toenails and i see them a lot after i play basketball. i don't know if people are stepping on my toes or what?

5 doctors weighed in across 2 answers

Bruising: These lines usually are caused due to traumatized nail beds causing internal bleeding in the nails. It can also come from improperly fitting shoes and taking anticoagulants, like aspirin.

Answered 2/20/2015

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Dr. Heidi Fowler answered

Specializes in Psychiatry

May be due to: trauma/ pressure on nails causing small hemorrhages.

Answered 11/1/2018

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