I have it for at least 12 years. These parts change color from normal to brownish/black and then go back to normal. This happens throughout the day many times especially when I do exercise or have stress at work. Everytime I have some sort of stress ( even light stress) I look at my knuckles change color. I also let others check my elboes and they agree.
I have been a bit paranoid and kept checking the elbows of others and looked perfectly clear and matched the color of the rest of the skin.
I had Graves (hyperthyroidism) and 10 months ago I got my thryroid removed. Even before Graves I felt tired and demotivated. Now the same. I quit my previous job because I just could not stand the demotivation and the fatigue.
People at work keep noticing how tired I look. I hear much older workers saying that they slept only 2 hours and came to work and even at the end of the shift they look fine. If I slept 2 hours I would look dead from the start, let alone at the end of the shift.
I told that my doc and he said maybe I am a lazy person ...... no further evaluation.
I pressed him to do Diabetes test.
Hb1Ac was 4.6 and at that day it was 82. So I guess no diabetes.
I found many with the same condition who got their thyroid removed and they never complained. I keep asking them how they feel and they say: GREAT ! With some we even take the same drug and the same dosage.
I keep losing weight since the operation even though I eat well. So no weight-gain from having the thyroid out.
Do you think it is Addison's ( even if it is so rare ?) My gums don't look discolored.
All in all, fatigue, tired, demotivated, losing weight without constricting calories and those dark patches that come and go according to stress.