It may be that they were there all along, and the herbs are just stirring them up so you now feel them in that area.
An infusion enema, with garlic water goes straight to the liver, I have had really good results with those.
Or your could add your herbs to the water. Which ever, you want to try to hold it for 10-15 min like a coffee enema. A follow up coffee enema later after the first enema has time to work can help purge them out.