Diagnosed with a concussion 2 weeks ago felt better the last week now i got a sudden severe headache out of the blue should i be seen?

Concussion treatment: The mainstay of concussion treatment i'd cognitive and physical rest followed by a gradual increase in activity. If symptoms return from increase activity continue rest. Recovery from concussion is variable person to person. Seek the advice of your doctor.

Concussion eval.: If it's persistent, yes it should be evaluated. If isolated, it can be watched.