Bicolor problem

[C-Bone]

I've had my bicolor blenny for about a month. I also have two tank raised clowns, which I've had since December, and they are doing fine. About a week ago I noticed the blenny kept rubbing his right side against the rocks. He is swimming around and eating fine. He is starting to get a white patch which starts behind his eye and ends just past his fin. It looks like the skin is just getting raw from him rubbing against the rocks. He does not have any white spots or any other marks. I tried uploading a photo but the file size is too big. I'll work on getting one up soon. Is this something I should be concerned about? Any help is appreciated.

[seahorsejl]

Mine was doing that about a week ago. He has since stopped. I think some stress caused it. With good water quality, yours should also heal up.