My son used to wake up cry/scream I think it it is a sign of processing things that have happened.. Does your so. Take melatonin? It can cause vivid strange dreams that may be upsetting him... A good night time routine, room darkening curtains and petah do music can help..my son rarely does it now

My 3 year old been doing that and when he wakes up he acts like he is hallucinating it's scary and I'm not sure what to do either

she has had night terrors before but that was during a transitional period such as when she started a new school and after her baby sister was born. We use white noise, lavender lotion rub down and a set routine to help avoid them. A night light may also help.

my son 4 and hav no clue on what u are talking about