I have NO idea why DS 3.5 wakes up crying but he does seem to be in pain.
If asked, he can tell me his back or knees hurt. He might settle eventually but cries really hard and then falls asleep but will wake up similar later.
Google thinks it could be growing pains in his knees and to give calpol before bed.
DH in particular is uncomfortable about this as a solution but DS and I need sleep that isn't disturbed by 30 minute screaming sessions and pain. Last night was much better and he only woke twice but not in pain.
He doesn't seem to have pain in the day, although if you ask will say his back hurts.
Could it be growing pains??
We're already waiting for an MRI for hs back to rule out anytiing else but now his knees hurt too!