Side effects Eclar Plaster

Hi everyone, I'm M17. I have used Esclar Plaster for over 1 months( I use cosistently by applying two-third of plaster/use and change it after 48 hours). The progress looks promising, new keloid seems flatten noticeable and the old ones are less tough. However, the keloids that I apply are itchy sometime and the normal skin is whiten. Recently, I feel nervous and worried(kind of mental relation I think) sometime and feel my back neck was tired and uncomfortable(I dont apply it here). Does the eclar cause this or just I feel stress by myself( cuz I'm also a student prepare for important exam)? And Do I overuse this too much( I have many small-medium size keloids on my arms, and some on my chest). Thanks!