The medical term for healing crisis is the "Herxheimer Reaction." This occurs when the cells release toxins into circulation but the elimination organs (skin, lungs, liver, kidneys, bladder & GI tract) are not able to eliminate them quickly enough.
The healing crisis is very natural and unique for everyone. Most people experience very mild symptoms while others experience severe issues. You need to understand that these symptoms are temporary and will subside as the body gets healthier and toxins are eliminated. Symptoms usually reduce or are eliminated within two to three days but on rare occasions can last a few weeks. You may experience:
stiffness, aching muscles, tiredness
Shivery - this is due to blood capillaries opening up to increases blood flow to the muscles and the skin surface
frequent visits to the toilet - this allows your body to get rid of waste
runny nose / coughing - again this allows your body to get rid of toxins
your body is in a repairing phase and might take some time to re-adjust.