So in the last two days I noticed my snake seems more sluggish than normal. He ate fine on Sunday and I left him alone on Monday. But when I handled him on Tuesday and today he seems sluggish. When I pick him up his bottom half just dangles and seems limp, instead of curling up and wrapping around stuff like normal. I don't think there is anything physically wrong with him because he can still move if he wants to, and has the strength to dangle from his tail. After handling him longer he gets more active but he is not usually sluggish like this when I take him out. I also noticed that he has developed what looks like a dry patch on one of the large scales on his head. It looks like it could be a piece of stuck shed but it wasn't there before.

The temperature in his bin is 90 degrees on the hot spot with air temp of 76 degrees above the cold spot. Humidity is around 60%. This has not changed in weeks and he has been fine up until yesterday. So should I be concerned?