Looks like the blisters my male had couple years ago. I had a branch to close to his light. He stayed on that branch for long time. Next day I noticed the blisters. I'm not saying that's what yours are, just what mine had. It took a couple sheds for the scars to go away. He still has a little scar in one area. This is a pic of him when he was smaller. He's a good 8 feet long now.