What's With These Ridges In My Fingernails?

Nail Trauma

If there has been recent trauma, like banging or hitting the fingernails against something or falling, brown or red spots might form under the nail. Injuries that result in a torn or crushed nail, a cut through the nail (ragged or clean), or bleeding through the nail should be seen by a doctor immediately. But if no trauma has occurred, and red, black, or dark brown spots appear under the nail, it might be a good idea to visit the doctor to determine a cause. Sometimes, trauma to a fingernail can damage it in such a way that results in ridges forming during the healing process. In these cases, it's often a matter of letting the nails grow out and trimming them as this happens.

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