Linda:
Pigmenation of sudden onset on the palms almost surely has to be soemthing from the outside, something you touched or handled. I know of no
systemicSystemic lupus erythematosus
Systemic lupus erythematosus rash on the face or internal diseases which can cause that kind of problem. Think about what you've been doing, and wait a few days -- the pigment is bound to slough off.
If you still have it in a months' time, have someone check it out for you. But I doubt you'll have to.
Best.
Dr. R
Good luck,
Dr Phillip Cheung
Dr. R