hopeful mom,

Welcome to NeuroTalk. Sorry to hear of your daughter's struggles.

The neuros are half right. There is not a full definition of what a concussion is so trying to define a relapse is even more difficult.

Either way, your daughter is struggling and has doctors who do not know enough about concussions to help her understand what is happening. This is not uncommon.

Another term that can be used is 'decompensate' although relapse is close enough for me.

Please tell us about your daughter's injury and her history since her original concussion. What has been recommended for her to help her with her recovery. Tell us about her health, age, usual activities, easting and drinking habits, (junk food and caffeine, etc) and we will be better able to help you understand what is going on with her PCS.

It also helps to know where you are so we can suggest treatment, etc that fits your location.

There are plenty of good people here who can offer great support.

My best to you both.