I'm definately have flares where symptoms are worse and then I also have days sometimes several where I'm feeling better. I'm going to start keeping a daily diary to see if there are any patterns in my symptoms. The last 2 days have been pretty good for me... pretty uneventful besides the usual ankle pain. I'm sure it'll pick up again in a few days though. It always does. Last weekend was horrible though. I had worse dizziness, fatigue, and nausea and night sweats/chills.
I wish I could offer a simple answer, but I'm all over the place! Between changing medications several times, adjusting supplements, and working on my diet, I really can't say what's correlated with what, and my symptoms seem to be shifting around.
In general, before treatment and during my years undiagnosed, I noticed that my PMS worsened and began to involve more upper leg and lower back pain and fatigue. It wasn't until much later after I knew I was ill that I connected the dots that this was Lyme-related.
Since becoming more acutely ill, worsened brain fog and heavy fatigue upon waking have been typical harbingers of a flare.
Things were much worse when I was first ill ... because I had babesiosis and it's a bear.
Now that I have 'only' Lyme, I seem to get a flare about once a week lately, feeling a little tired, a little confused sometimes, memory a bit slow, eyes a little red, a little short of breath sometimes, my breastbone aching a little bit where the cartilage connects to the ribs (Lyme loves cartilage).