Tan lighter on one arm?

[Sally1982]

I did a client last night and she said one hand and arm is lighter than the other ?... i really dont know how this has happened as obviously looked fine straight after i did it has anyone had this before?
xx

[wonderwoman]

maybe she slept on it, maybe she rubbed it, maybe just maybe she put a moisturizer on it beforehand. It doesnt sound like its anything you did. Dont panic, its most likely her guide colour wash off/aftercare on herself wasnt great! hths xoxo