Hello, I'm a scientist, and I just woke up with these on my hands, after various hours of running through these posts, as well as experimenting with different chemicals to remove this from my skin, I have found a solution:
The cause of this orangish stain on skin seems to be the same mechanism as self-tanner, but coming from different products that are NOT self-tanners.
Products containing DHA.
DHA is Dihydroxyacetone, and it interacts with the skin producing melanoids.
The reason we are all noticing it only upon waking up in the morning, is, like self tanners, it takes hours to develop, so we don't notice it right away, but upon sleeping for 5-8 hours we wake up and notice it on our hands.
Hands and feet are specifically susceptible to this process because they're the dryer parts of our skin.
Those who apply self-tanners for example will notice that if they're applied on the arm, and then applied on the hand, the place on the hand where it was applied will notice much more color change, and it will be much more difficult to remove from the hands.
So, how do you remove it? Using a cotton ball or paper towel soaked in acetone, press and hold on the effected area for about 20 seconds then begin to rub, using either the cotton ball, or an exfoliative pad, and this will remove the color.
Now for the bigger question:
Which products did we use containing DHA? And why weren't we aware of it, why wasn't it included in the marketing material? So think to yourselves, which liquid/moist products have you used that could contain DHA in the last 24 hours?
Baby wipes? Skincare products? Cleaning products? Paints? Lotions? Self-tanner?
So, don't panic, you may photograph it and show it to a doctor if you'd like, but it is a harmless interaction with your skin.
Also, give your hand a smell, does it smell a little sweet? Does it smell a bit like urine? Soy sauce? DHA causes these strange smells to be released from the skin when it is chemically interacting and causing the melanoids to be produced.
Cheers!