Any idea what these are?

[adeuk]

My wife notice these yellow/green patches on my back yesterday, which was obviously pretty alarming! There are few smaller ones, but this is pretty representative. The big one is a little itchy (started yesterday, which is what drew my attention to it), but only it seems when it's irritated by clothing. I've booked an appointment with a Doctor, but that's not for a few days, so I'm just trying to do a little more digging... Any thoughts would be gratefully received!

[gfmum1]

You've already got a doctor's appointment so clearly you don't need anyone to tell you to get his opinion!

You don't say how old you are, but could they be sebhorrheic keratoses, which tend to be age-related and according to the following article can be yellow? dermnetnz.org/topics/seborr... I have a few on my back & my GP took great delight in telling me they were due to my age!!