Why does a child tilt their head back while sleeping?

It's so lovely to watch a peacefully sleeping baby with a smile on their face. However, occasionally you might notice something unusual — the child tilts their head back. Situations where a baby adopts such an awkward position happen quite often. In most cases, this is perfectly normal and physiological, meaning it doesn't require treatment and shouldn't concern parents. But sometimes, it may be necessary to consult a specialist.