While cleansing you will often feel tingles, squirming, itching, pin prick sensations underneath the skin. This is actually a good thing as it means the parasites are becoming restless and dying and/or trying to move to different parts throughout the body to find a safe haven. Whatever you do, keep doing what you're doing until you no longer have signs of parasites. The biggest mistake people make is thinking they're getting better then they stop cleansing and their problems come back immediately.
Also, if you are having severe parasite symptoms WITHOUT cleansing, it means you are so infected that they are physically causing you illness and you can feel them EVEN when you're not cleansing. If that's the case, you really really need to start cleansing ASAP.