9 months old cries hysterically while sleeping multiple times a night

Hi all, since day 1, my boy would cry hysterically while sleeping - multiple times a night. He's not overtired when go to bed and stays within the recommended nap time / whole day sleep hours. But every night without fail he will cry hysterically (eyes still close) and only stop when we pick him up and soothe him. He has never slept though the night... Anyone experiences this too? Any tips?