Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties

168 Doctors Online
Doctor Image
Dr. Andrew Rynne

Family Physician

Exp 50 years

I will be looking into your question and guiding you through the process. Please write your question below.

Light brown streak in the left hand thumb nail. What could this be?

Answered by
Dr. Pavan Kumar Gupta

General & Family Physician

Practicing since :1978

Answered : 6714 Questions

Posted on Tue, 3 Dec 2013 in Skin Hair and Nails
Question: I have a light brown streak going down the length of my left hand thumb nail. I'm Caucasian and haven't experienced any trauma to my hand. Just happen to notice it in the past week so I can't really tell you how long it has been there. I feel like I would have noticed it previously, but who knows. It only appears on one nail.
Answered by Dr. Pavan Kumar Gupta 1 hour later
Brief is called as melanonychia. Detailed answer... Hello, Thanks for the query. Melanonychia is actually the presence of melanin pigment in the nail plate. It generally presents as longitudinal band but can cover the entire nail or may present as transverse band also. Sometimes melanonychia can occur due to trauma,fungal infections,drugs like anti malarials and sometimes due to skin conditions like psoriasis or lichen planus. For proper diagnosis,you would have to consult a dermatologist ,who can perform a biopsy and get to the diagnosis. I hope it helps however you may revert to me for any further query. Best of luck Thanks
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

The User accepted the expert's answer

Share on
Question is related to
Diseases and Conditions ,   ,  

Recent questions on  Melanonychia

doctor1 MD

I have noticed very faint line on my fingertips Picture attached. I’m concerned it might be subungual melanoma . Please advise

doctor1 MD

Hello Doc, I am XXXXXXX An XXXXXXX a vegetatrian (recently started eating egg). I am living in Japan. After coming to Japan an year ago. I feeI, I have starred to develop some kind of nutritional deficiency . Because of japanese workig culture....

doctor1 MD

I have a thin black line in my right thumbnail. And a slight dent in the middle of my nail where the black line is. Should i be concerned Attached picture and link in question

doctor1 MD

Hi I have a black line on my thumb nail. Iv looked on the internet. And it is saying it s skin cancer. Can you please tell me if it is skin cancer. I have been to my doctor and he is sending me to see a specialist. I am very worried. Could you please tell me what it could be and what will I expect if it is. And what is the life expectancy. My doctor did ask me if I have had a skin disease, which I have not. I am so worried. Hope you can help.

doctor1 MD

My son went to dr at college for what is called longitudinal melanonychia. He has had it a while and didn t realize it was something ro be concerned about.All his fingernails seem to have a little discoloration darkness under them I am concerned thos my be serious and spreading. Hospital does not have derm at sight and referrals from hospt and general dr not till monday.

doctor1 MD

HI, Im a 20 year old female. I had ultra severe dyshidrotic eczema on my left ring finger this winter. The traumatizing photos on google image searches look lovely compared to what happened on my finger. All of the skin on my finger crusted up and fell away, including the skin all around my finger nail and cuticle, and left the base of my nail 100% exposed. The eczema is completely healed now, but ever since my cuticle was murdered, the nail has been growing in with zig-zagged beaus lines, weird lumps and abnormal separations from the nail bed. It's been about 4 months, and as of this week, my damaged nail has grown in enough that there is no longer any normal nail left. It is totally lumpy, soft, sensitive, a deep dark red in color toward the base, and steadily growing in this way. Should I see a specialist, or is this normal for nail bed injuries? What is going on with my finger?

doctor1 MD

Hi Doctor , Good morning. Just 1 day before I noticed that some brown marks are appearing in the nearby tissues( just in the side edge of nail ) of my fingernails. Kindly may i know the reason for the same. Thanks, Ramesh