<s>[INST] Hi there, my son will 5 in April. Two weeks ago he slipped and hit the back of head (more to the left) quite hard. Then four days ago whilst at basketball, the ball was thrown into his face quite hard. From four days ago he has a twitch in his left eye as well as movement of his head. He has had his eyes checked not too long ago and everything was perfect. Please advise. [/INST] Thanks for asking. Head injury preceding atypical movements of Head and neck would worry me. It may be due to increased pressure building inside head. Or may be bleeding inside head is lead to this directly or indirectly by exerting pressure. I would advise to immediately take your kid to Emergency department and they will refer you Neurosurgery. Your kid will be examined completely. They will carry out head and brain imaging like MRI and CAT scan if needed. Good luck </s>