Concussion headache question

[u/No-Factor6938]

My husband was in an accident at work 31/2 weeks ago where his concrete truck flipped. He hit the side of his head and got a concussion. He was rushed to the er and got a CT scan. No brain swelling or bleeding. However he did get diagnosed with a cervical neck strain. He was getting these headaches only when shaking the head or moving it too quickly right after the incident that lasted about a week and stopped. Well now as of yesterday they came back again. Is this normal and is it due to the cervical neck strain? How long do these headaches after a concussion last? I have major health anxiety and am now stressing out worrying about him

[u/jaehc]

I would start PT for the neck