What is 1 black line underneath your fingernail mean?

Liz, my son is experiencing the same thing. We can't see the dermatologist for 2 more months.

I'm looking and looking for any kind of encouraging sign that its nothing.

How were the doctors axle to determine it was nothing serious?

Thank you for saving my thumb and maybe my life!!!! I read your response and went to the Dermatologist. It was melanoma. I'm a guitar player and I begged them to try to save my thumb. I had a full layer skin graft that completely removed my thumb nail and the matrix. Cancer is gone and I can once again play my beloved guitar. Thank you for your post! You made a difference in my life!!!!!!!!!!!!!

Hi there did you get any feedback on that symptom of your thumb. I'm worried my dietician read up about it and told me it might be a sign of melanoma cancer.

Years ago I kept a brown vertical line in the center of my thumbnail.  I consulted with a healthy food/natural food specialist who looked it up and indicated I was deficient in enzymes.   I bought some enzyme tablets and within a couple weeks the streak was gone.   FYI, any kind of carbonated beverage (even water) destroys your body's enzymes.

Hope this helps!

Kate

I have read on WEB MD that black lines on nail from the nail bed to the tip wider dark lines not thin, is malignant melanoma, breast cancer, or Addison's disease and I have one on each thumb and one on my pointer and middle finger. I'm getting a mammogram next week, an ultra sound and have an appoinent with general doctor for testing and an appointment with a skin specialist next week. I AM VERY CONCERNED WITH THIS. I have been sick a lot lately and various other symptoms extreme fatigue, nausea, numbness, stomach problems etc.. I will let you all know my outcome.

I started off with a black line in my right hand thumb 5 years ago and got it tested, the surgeon removed the whole nail and seemed confused at how the line was growing through my nail instead of being on the nail bed as they expected. the biopsy came back negative for malignant melanoma and as the nail grew back so did the black vertical line. about a year later, my toe on the right foot was bleeding from walking to work daily with tight shoes, on looking thoroughly at my toe I discovered it too had a black line running through it and again it was tested and came back negative. recently (about 5 months ago) I noticed a line on my pinky on the right hand has a black line in it also, this time it feels uncomfortable so I mentioned it to the doctor and he asked me if I wanted to do a biopsy on that one also, I declined but now I think I might change my mind. I have one on the pinky on my left hand now, I only discovered that a few days ago (its a lot more faint than the others) I have psoriasis in my elbows and other places on my body and I am under a lot of stress, mainly due to lack of sleep caused by breathing problems. I think I need to get a full check up, something is going on with me that they are not noticing, surely. the strange thing is, the doctors have never told me what it is causing the black lines, they just say its not cancer and leave it at that. I would advise that anyone who has them should get themselves checked out asap. apparently Bob Marley died from cancer and it was from a black line in his toe.   

I suddenly had a black line growing up through my nail, by chance i felt my breast and found a lump and have just been diagnosed with breast cancer. Nails always tell us if there is something wrong with us, please dont ignore your nails.

what happened? Please reply

I SLAMMED MY FINGER IN MY CAR DOOR A YEAR AGO. WHEN MY NAIL AND NAIL BED GREW BACK AND HEALED. THATS WHEN THE BLACK LINE CAME. WHAT MADE ME NOTICE IT WAS A CO-WORKER SAID TO ME WHY DO YOU HAVE THAT DARK LINE THROUGH YOUR RIGHT THUMB NAIL BECAUSE I HAVE THE SAME THING THROUGH MY LEFT THUMB NAIL. SO I TOLD MY CO-WORKER THAT I WOULD GOOGLE WHAT IT MEAN. AND I GOT ALL KINDS OF THINGS LIKE CANCER, TRAUMA TO THE NAIL, HEART DISEASE AND A FEW OTHER THINGS. WHATS A SURE WAY TO FIND OUT WHAT IT REALLY MEAN?

I have the same issue about that line except that it's on my left thumb. hahaha I'm fed up also with that question.

Snap o have one line on right thumb and one on left forefinger. See a dermatologist

I have a black line going up and down my left index finger and now have faint black lines lightly appearing on both my left and right thumb. They are very visible if you put a light to my thumbs. The index finger you can clearly see. Pulmonary disease?

Just wondering how you are? I had my lt big toe amputated dye to toenail chance.(acral melanoma)

Do you mean you had a melanoma on the nail itself? Or does a melanoma on some other part of the body have a side effect of a black streak on the nail?

I HAVE A DARK LINE UNDER MY THUMBNAIL, THERE'S A SPOT ON MY NAILFOLD ALSO...SHOULD I BE CONCERNED?