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Doctor insights on: Anyone Know What This Brown Line Growing On My Fingernail Could Be

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Anyone know what this brown line growing on my fingernail could be?

Anyone know what this brown line growing on my fingernail could be?

Melanonychia: Longitudinal melanonychia may be a sign of subungual melanoma (acral lentiginous melanoma), although there are other diagnosis such as chronic paronychia, onychomycosis, subungual hematoma, pyogenic granuloma, glomus tumour, subungual verruca, mucous cyst, subungual fibroma, keratoacanthoma, carcinoma of the nail bed, and subungual exostosis. ...Read more

Fingernails (Definition)

Fingernails are the hard coverings at the end of fingertips. Nails are made out of a protein called keratin. they function to protect the fingertip and to increase sensitivity of touch. Good hand hygiene and nail care is important to prevent bacterial ...Read more


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What could cause a brown vertical line and horizontal ridges on one side of only one fingernail?

What could cause a brown vertical line and horizontal ridges on one side of only one fingernail?

More info needed: Sounds like you damaged the nail bed at some point in time. Could also be fungal. Can you re-ask your question and attach a picture???? ...Read more

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I have a light colored brown vertical line on my index finger and middle fingernail on my left hand. I used to have a habit of biting my nail and peeling off layers from my nails, could this be a result? I hope this isn't anything too serious! Thanks so m

I have a light colored brown vertical line on my index finger and middle fingernail on my left hand. I used to have a habit of biting my nail and peeling off layers from my nails, could this be a result? I hope this isn't anything too serious! Thanks so m

So do I!: So do I on my index finger! This is completely benign (not a health problem at all) and has nothing to do with your previous biting habits. Think of it like a freckle or a discolored hair. It is made the same way by the nail cells right at the quick. They put dark pigment (melanin) into their growing nail and it extends as the nail grows. Think of it as just making you more unique and special! ...Read more

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I have a light colored brown vertical line on my index finger and middle fingernail on my left hand. I used to have a habit of biting my nail and peeling off layers from my nails, could this be a result? Also, I will be seeing my general doctor for a chec

I have a light colored brown vertical line on my index finger and middle fingernail on my left hand. I used to have a habit of biting my nail and peeling off layers from my nails, could this be a result? Also, I will be seeing my general doctor for a chec

Could be: If it on only one or two nails that argues for a local damage to the nail or nail plate underneath the nail. If it is in the nail proper it will just grow forward and out and you will cut it off. If it was systemic -eI.e. You ingested something- I would expect all of the nails to be affected. See a good dermatologist if you're worried. ...Read more

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While treating my plantar warts, I picked at them. Now something is growing under my index fingernail. Could be connected? Where else could it spread?

While treating my plantar warts, I picked at them. Now something is growing under my index fingernail. Could be connected? Where else could it spread?

Plantar warts: are definitely able to spread. They can spread to the fingers as well. There are different types of treatments that work well that can be prescribed to stop any spreading and to heal the current lesions. You should consult with a Podiatrist for proper diagnosis and treatment. ...Read more

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I have a brown vertical line on my left thumb and a lunula on my left index finger. What do these mean? My right fingernails are perfectly normal.

I have a brown vertical line on my left thumb and a lunula on my left index finger. What do these mean? My right fingernails are perfectly normal.

Many things: The line is likely a melanoncyhia which can be normal particularly in african/african american descent. It can also represent infections, trauma, or inflammatory problems. Remember a lunula is a normal part of nail anatomy. If it's abnormally large, it may be a Terry's nail(though this tends to affect multiple nails) or just a variant of normal. Seek help from your doctor for more feedback. ...Read more

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Very faint 1mm grey regular line growing along fingernail. 2 dermatologists (dermoscope) said its not melanoma. Should i push 4 biopsy?

Very faint 1mm grey regular line growing along fingernail. 2 dermatologists (dermoscope) said its not melanoma. Should i push 4 biopsy?

Watch & measure: Given the advice of 2 experienced physicians, i wild hold off for now and continue observation for now. If it should change at all, bring tis to the attention of your managing physicians -give it 2-3 months. ...Read more

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Dr. Peter Lio Dr. Lio
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What is the vertical brown line under fingernail? I'm taking iron vitamin for anemic. 8 month ago I use clobesatol for alopecia.

Dr. Peter Lio Dr. Lio
1 doctor agreed:
What is the vertical brown line under fingernail? I'm taking iron vitamin for anemic. 8 month ago I use clobesatol for alopecia.

Melanonychia: Melanonychia is a brown-to-black line within the nail, frequently seen in patients with darker skin and often on multiple nails. It can be seen in certain syndromes or due to medications. Rarely, it can be a melanoma of the nail and so needs evaluation by a dermatologist. Probably not the nail changes of anemia or alopecia which are usually not brown lines. ...Read more