ellie_may10,

Welcome to NeuroTalk. I'm sorry to hear you are suffering so.

It is rare for someone to continue vomiting for 3 weeks after a concussion. It is not uncommon to experience nausea for weeks but not more that just a nauseous feeling. Does your doctor know you are continuing to vomit ?

If your doctor does not know you are continuing to vomit, you need to call the doctor right away or even be seen at an urgent care clinic or emergency room.

Have you had a CT Scan of your head ?