Black gums in caucasian humans?

[~Vulpine~]

Can anyone suggest a condition where one of the symptoms would be a darkening or blackening of the gums and lips?

[Ethel]

Gum disease.

See your dentist

[tiggerblue10]

Gangreen of the mouth!

[sqad617]

No. but could be perfectly normal. Ethel is right, see your dentist.

Just an afterthought, you do really mean blackening and not dark blue?

[daffy654]

Someone has been eating Black Jack sweets :-)

[David H]

People who take colloidal silver can develop this colouring as it deposits silver compounds all over the body which will show in these places.
It's also a symptom of heavy metal poisoning

http://en.wikidoc.org/index.php/Heavy_metal_po isoning

[Ice.Maiden]

Absolutely agree with David H, but unless you or the person who has these symptoms works near radioactive substances, then you need to see your dentist, as mercury from old fillings could cause this.

[J9PUR]

Depending upon the distribution of the patches, and their number other diagnoses could be:
Racial pigmentation
Amalgam tattoo
Subgingival calculus
Melanoma
Addisons Disease
Heavy metal poisoning (lead, mercury, bismuth)

As mentioned by squad617, it could be quite normal, but your dentist should be able to confirm this