Swallowing requires coordination of a lot of different muscles. Do you mean that you can’t get the swallowing process to start or that you swallow and food doesn’t go down all the way?

I had a lot of problems with the latter when I was sick with undiagnosed celiac and later developing type 1 diabetes. I’d swallow fine, but it would feel like the food was stuck in my sternum and it was very miserable. They couldn’t find anything physically wrong with my esophagus at the time. My interpretation was the esophagus was inflamed from acid reflux and thus narrowed.