It's a relapse if:
Not every symptom is a sign of a relapse. If yours last less than 48 hours, you may have had something called a pseudoexacerbation. That’s when you temporarily feel symptoms. Keep in mind that even the slightest fever could be a sign of an infection. That also can cause problems like those you’d feel during a relapse.
- You’d been free of symptoms for at least 30 days before the ones you’re having now started
- They last at least 24 hours
- There’s no obvious trigger