Question 1

hi, i have recently observed  a straight vertical black line on the thumb nail of my 9 year old daughter. googling it has spoilt my peace of mind. there are no other issues or injuries. could you please let me know what that black line on the nail is?

Accepted Answer

Need eval to know: Black stripes down 1 nail may be subungual hematoma.  Red or brown streaks may be splinter hemorrhages. Brown/black lines from nail plate to tip are often seen in people with dark skin &amp; are normal. Subungual Melanoma can cause nail ridges &amp; dark colors of cuticle. It most often effects the thumbs or big toes. Dark lines may be due to other illnesses. Get checked out when in doubt.

Question 2

hello i have i black line on my left thumb and i want to know why?

Accepted Answer

Please see below: Usually this is traumatic in origin but happens in some medical conditions as well. If you have a psoriasis, you can see some changes  in nails. Similarly, there are few other conditions we can see these nail findings. If you have this line for long time , its good to see a doctor.

Question 3

35 yof extensive medical history have a growing vertical black line on my right thumb.  noticed about a month ago getting longer and darker...what is?

Accepted Answer

Black line on thumb: this needs a visit to your dermatologist. Is it on your nail, does it involve your cuticle, is it horizontal or vertical? All of these questions need answers.

Question 4

hi dr
my almost 2year old has a black line on her thumb. should i be worried?

Accepted Answer

On the nail ?: Nail discolorations can be long term  and a sign of disease or dietary deficiency, suggest you take you child to a dermatologist and see if this is in need of further investigations

Question 5

i have slammed a door on my thumb and it is more than black & blue. could it be serious?

Accepted Answer

Owwwww: I cannot tell for sure without seeing it  but if it is excessively painful, continuing to swell or obviously broken get it looked at right away.

Question 6

i slammed my thumb in a car door three weeks ago.  the nail has turned black shortly after, but now there is a foul odor.  should i be concerned?

Accepted Answer

Yes: The nail bed is covered in old blood that alone would not be a concern but with foul odor implies tissue destruction and infection. Needs to be properly evaluated by your doctor.

Question 7

what causes a very thin vertical black line down thumb nail?

Accepted Answer

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 dermatogist evaluate the nail.

Question 8

my left thumb has a black line going up the nail bed .it started a small line ! i did not hirt myself ! what is this?

Accepted Answer

Melanonychia: Melanonychia is brown or black pigmentation of the nail unit. Melanonychia commonly presents as pigmented band arranged lengthwise along the nail unit, and this presentation is known as longitudinal (lm) melanonychia or melanonychia striata. The most important cause of melanonychia is subungual melanoma although a variety of other causes includes trauma, drugs, fungal infections, other disorders.

Question 9

my boyfriend has a black line on his thumb nail .. what does it mean ? how can it go away ? is it something to be worried about ? he hasn't smashed it

Accepted Answer

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 dermatologist.

Question 10

my thumb swells up and turns black and blue from barely hitting it or even taking notes in class fractured growth plate and tore tissue 8th gr. now sr

Accepted Answer

Get it checked...: Glomus tumor can because discoloration and sensitivity. It's usually very cold sensitive. Typically occur beneath the nail. X-rays can be helpful, but sometimes an MRI is necessary.

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Doctor answers about:

Transverse black line on the thumb

A member asked:

Hi, i have recently observed a straight vertical black line on the thumb nail of my 9 year old daughter. googling it has spoilt my peace of mind. there are no other issues or injuries. could you please let me know what that black line on the nail is?

A member asked:

Hello i have i black line on my left thumb and i want to know why?

A member asked:

35 yof extensive medical history have a growing vertical black line on my right thumb. noticed about a month ago getting longer and darker...what is?

A member asked:

Hi dr my almost 2year old has a black line on her thumb. should i be worried?

A member asked:

I have slammed a door on my thumb and it is more than black & blue. could it be serious?

A member asked:

I slammed my thumb in a car door three weeks ago. the nail has turned black shortly after, but now there is a foul odor. should i be concerned?

A member asked:

What causes a very thin vertical black line down thumb nail?

A member asked:

My left thumb has a black line going up the nail bed .it started a small line ! i did not hirt myself ! what is this?

A member asked:

My boyfriend has a black line on his thumb nail .. what does it mean ? how can it go away ? is it something to be worried about ? he hasn't smashed it

A member asked:

My thumb swells up and turns black and blue from barely hitting it or even taking notes in class fractured growth plate and tore tissue 8th gr. now sr

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