finger nail discoloration black nail

the nail on my thumb is a really dark red or even black color and it has been this way for many years now, i have been to the doctors but noone has had a solution and has just say it is normal discoloration and is not harmful so just leave it. However I really want to fix this issue, the only thing I can think of is that when i was younger i used to bite my finger nails often, not sure if that has anything to do with this. but it is mainly just my 1 thumb, however my other thumb is somewhat discolored as well but not as severe as the other. There is no pain or anything from the thumbs or nails so I am not sure what this is can anyone please give me some advice? I have recently tried researching solutions and came across 'ZetaClear' but I am not sure if that is what I would need since I am not sure what my real problem is and why it has become this color. Any help would be appreciated, thank you

[allmymarbles]

Has the doctor checked for a fungus?

[crisptees]

no i have tried about 3 doctors, and they have all said it is nothing i should really have to worry about and that it is just 'nail discoloration'
they haven't checked anything other than by just looking at my fingers and feeling them, any idea?

[allmymarbles]

The reason I thought it might be toenail fungus is because that is what my husband gets. And, yes, his nail turns black. Check out the internet.

[crisptees]

What would you suggest I do? I have tried the internet and found some solutions, the best one in which I have seen on the internet is called ZetaClear. What has your husband done? Thanks for your help by the way

[allmymarbles]

Presuming it is actually a fungus, there is a problem because it is under the nail. Outside, on the skin for instance, you would just use Vick's-Vapo-Rub (believe it or not). Getting under the nail is a problem. There are systemic anti-fungals, but my husband did not have much luck with that. He kept painting the nails and pushing stuff under (as far as he could). I think it is pretty well gone now, but it took a long, long time. I would go back to the doctor to confirm that it is, or isn't fungal. Then see what he says.

[crisptees]

Oh ok, I have been trying to use tea tree oil on the outside of the nail and trying to get some under the nail as much as possible, you would suggest Vick's over tea tree oil? I will try to go to the doctor but schedule is tough now so hopefully I can make it soon. Thanks for the help and hopefully this time the doctor will have a better answer than 'don't worry about it'

[WontshutUp]

I have been to the Dr. for this.  It's not a fungus or an infection.  Dr.'s really do not know what it is.  I am thinking it may be an actual problem but when Dr.'s don't know, then it must not be important or a problem.... it is a problem.  There is something undetected living inside of you!  Soak them for ten minutes in white vinegar and H20, 50/50, twice a day.  I have been doing this for a couple weeks and I feel like there is improvement.  White Vinegar is a natural disinfectant... this is aggravating.