I got bit by a tick carrying rickettsia a few weeks back. I have been taking doxycycline for about a week, but had to stop due to severe head/eye pressure. I have been using teasel root tincture a few days, starting with 1 drop and today worked up to 3. I got hit by quite a violent reaction, which intensified all my symptoms, including headache, eye pain, nausea, malaise, tremor/anxiety. I am not aware of any side effects from teasel root, so would this be a herx reaction? As a side note, oregano oil doesn't cause any herxing (or symptom increase) at all.