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line thumb nail

A 34-year-old female asked:
Dr. Coyle Connolly
29 years experience Dermatology
Nail line: Usually it is a normal variant. Sometimes a mole or even a rare melanoma skin cancer can look like a black line in the nail. You should have a dermato ... Read More
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A 29-year-old male asked:
Dr. Maryam Shapland
17 years experience Emergency Medicine
May be from injury: Sometimes trauma/injury to the nail can cause bleeding from under the nail, which then can cause brown areas under the nail or on the nail itself. I ... Read More
A 17-year-old male asked:
Dr. Rifat Naghmi
46 years experience Internal Medicine
Black line: This probably is going to last for a while. Unfortunately, there seems to be no explanation to the process. It won't hurt to check out with a dermatol ... Read More
A 36-year-old male asked:
Dr. Geoffrey Rutledge
41 years experience Internal Medicine
Nail health: Single lines in a thumb nail can be a normal variant if they are small. However, your nails can also provide a signal for nutritional deficiency and c ... Read More
A female asked:
Dr. Lori Lange
Specializes in Family Medicine
Cuticle: Maybe the cuticle is pushed back. Or possibly fungus. See a doctor or send a photo for help here.
A male asked:
Dr. Edgar Mendizabal
55 years experience Internal Medicine
Not unusual: dont treat it unkess it gets karger i which case you should see dermatologist
A 53-year-old female asked:
Dr. Matthew Walvick
12 years experience Internal Medicine
Splinter hemorrhage: This is likely a splinter hemorrhage. This is very common after a minor trauma to the nail - you may not have even been initially aware of the inciti ... Read More
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A 45-year-old female asked:
Dr. Michael Dugan
Specializes in Hematology
Not likley: Melanomas are not linear. I suppose you could have a melanoma under the nail, but i still do not think it would look linear.
A 45-year-old male asked:
Dr. Robert Kwok
33 years experience Pediatrics
Doctor can evaluate: If there are depressed lines going horizontally in several or all fingernails, one can visit a primary care doctor to see if any particular illness or ... Read More
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A 21-year-old female asked:
Dr. Julie Abbott
45 years experience Preventive Medicine
Probably benign: The diagnosis that seems to most closely fit with your description (without a picture) is melanonychia striata, which is most common in the thumb. It ... Read More
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