Well, it's like this - if you had an itchy rash before you started the parasite cleanse then when the parasites are leaving, you will experience itching in the same place as before. This is because your body is used to trying to remove parasites and their toxins from certain areas of your body. Removing the parasites and their toxins may cause these symptomes to flare up - moodiness, headache, rashes, acne etc., etc., etc. This is die-off and it will affect the weakest part of your body first.
The body will break down and flush out dead parasites (microscopic and visible) and will purify itself from their toxins too. MOST ALL parasites, larvae and eggs are flushed into the waste system and are disposed of through the stool. This is why a bi-annual parasite cleanse is so important - to keep your body free of the parasite burden.