Two days back got a small hit on the back of the head against wall. This was a small hit. There is no cut, redness or bump. There is no pain at the site of hit also. But after some time got headache all over head mostly on scalp and back of the head. This is not severe but kind of feeling heaviness in head. This is increasing with neck movements. I have neck problem of disk degeneration. Apart from this there are no other symptoms. Is this normal. Can I take zeredol-p for pain. Please advise.