Dog advice

[Dannyalcatraz]

Is it normal for a dog to make the loudest most unseemly noises while licking themselves? It's obnoxious.

I'm not sure if it's just fleas or a skin issue. He scratches a lot. I need to get video of this because it's funny looking. He will rub his back underneath a dinning room chair. He'll go back and forth. He also tries to scratch his back on the floor by rolling side to side.

I’ve heard some dogs do it, but never one of ours.