Girls, I need advice. My son has been sleeping restlessly for over a m…

Girls, I need advice. My son has been sleeping restlessly for over a month now, tossing and turning in his sleep frequently. The conditions of his sleep are good - temperature and humidity are fine. We have a good schedule, we wake up well. Neurologically everything is okay. I don't understand what's going on. His gums aren't swollen :( At first I thought it might be growth spurts, but that passed, and he still turns and rolls in his sleep, I don't know what to do anymore ? He basically sleeps, just spinning with closed eyes on the bed. How can I make his sleep stronger?