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What causes toenails to split vertically

A 28-year-old female asked:
Dr. Jason Armstrong
Podiatry 23 years experience
Cracks in nails: Usually more indicative of some form of trauma. Not a disease process. Vitamin deficiencies can weaken the nails they become very brittle and crack ea... Read More

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A member asked:
Dr. Heidi Fowler
Psychiatry 25 years experience
Please : Please see a dermatologist. It could just be melanonychia due to increased pigmentation, but a skin cancer called melanoma can also present with stre... Read More
A 20-year-old female asked:
Dr. Heidi Fowler
Psychiatry 25 years experience
Melanonychia Striata: Melanonychia striata is a brown-black lines in the nail the goes from the base to the tip of the nail. Get it checked just to make sure it isn't rel... Read More
A 42-year-old member asked:
Dr. Arnold Beresh
Podiatry 41 years experience
Trauma: A red line is usually i sign of trauma and bleeding under the toenail.
A 39-year-old female asked:
Dr. Patricia Foster
Psychiatry 44 years experience
See doctor: You're describing a fleeting vertigo or a fainting- like sensation that could have many causes. See your pcp for exam and proper diagnosis. Write down... Read More
A 54-year-old female asked:
Dr. Doug Mason
Podiatry 33 years experience
Genetic issues: nail issues can be hereditary, nutritional or trauma related. I would not be concerned unless they get worse. Look for changes.
A female asked:
Dr. Jonathan Posner
Podiatry 27 years experience
Trauma: A dark line that runs vertically down the nail can indicate that you might have traumatized the nail matrix(the area where the nail starts growing). O... Read More
A 36-year-old member asked:
Dr. Arnold Beresh
Podiatry 41 years experience
Trauma: Usually trauma or injury will cause bleeding under the nail and the appearance of being black & blue.
A female asked:
Dr. Jeffrey Kass
Podiatry 28 years experience
Sometimes this: Is a normal variant, sometimes it could be blood that is dried, melanoma at times needs to be ruled out.
A 52-year-old female asked:
Dr. Howard Schaengold
Specializes in Podiatry
Fungus vs. Trauma: The 2 most common causes of painful, thick toenails are fungal infections and traumatically induced changes to the nail. For a complete and thorough d... Read More

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