I have been battling this as well but have found some encouragements. I knew I had something, do I purchased the over the counter pinworm medication. The problem is this makes you sick and does not get rid of everything, nor the eggs.
I by chance picked up a bottle of Aloe Juice for the drink benefits. But as soon as I went to the bathroom, I expelled a huge tape worm! This got me researching and I found they, along with all the other types of worms, can't survive Aloe Juice!
I also found they can't stand spicy foods and if you sit your bottom in whole milk (non pasteurized) They will actual leave the body for the milk, then drown in it. It may take an hour of squatting in warm milk but is the least evasive.