Got the sleeve on 10/18. Just started solids last week and gained for the for the first time this week. Has anybody one else gained when they started solids?

When you say gained, how much you talking about? I went up a pound and a half but then my weight started to fall again again. I just stayed with the plan and didn't deviate. I also stopped weighing myself everyday and did it once a week.

It's food and water weight. You're straight up adding mass to your body with food and holding onto a bit more water to help digest it.

Nothing to worry about.