As roadrunner said, you will encounter a return of symptoms from time to time. Stress will cause a return of symptoms. You will be more sensitive to future head impacts. You will likely have more and different hang-overs if you drink alcohol. Nobody can predict when the ups and downs will come. Just that when they do come, you will need to reduce stress levels and maintain good brain nutrition.

I have lived with this roller coaster for 40+ years.