While undergoing a detox process, a person may fall sick and experience symptoms of a variety of illnesses. Instances of vomiting, diarrhea, high fever, stomach ache, headache, and nausea are not uncommon. This is especially applicable to a person undergoing liver detox as the liver generally holds a lot of toxins. Cleansing the liver makes it release the toxins into the bloodstream, which causes a variety of symptoms to crop up as a consequence.