Now, I’m not sure how accurate I’m going to be but this is how it was explained to me.
So essentially a new relapse is more damage to the CNS, which will take the form of Lesions/Scaring/Sclerosis etc on an MRI. When I asked my Neuro how long it takes for a lesion to form he said ‘hours’.
A relapse is classed as new or worsening symptoms that last for at least 24hours and 30 days from a previous relapse.
You might already be having a relapse, contact you MS nurse if you have one to talk in through.
I hope you feel better soon