Hello, another problem?

Hello, another problem ? The child has always slept in his crib since birth, I don't carry him on my hands and give it to anyone, only when I put him to sleep (he was rocked). It seems like he doesn't get fussy, there are no signals of any pain, but for a week he sleeps only in his arms and day and night. Where I put it, it cries. Only outside in the stroller can he sleep. And so only hands. What should I do? Why is that?