Hello! Who has a child with hypoxic-ischemic??? The baby is 20 days ol…

Hello! Who has a child with hypoxic-ischemic??? The baby is 20 days old. But very aggressive, restless? crying endlessly. We thought about colic gas, but no. It seems like it doesn't hurt anywhere. Normal sucks breast, every 2 hours, lots of milk. Sleeps normally. But why is he not lying down calmly?? What could this be?? Maybe ischemia??