One of the folkloric signatures/trademarks of Hoodoo is a practice of, what we could freely call a subgenera of Conjure, causing and treating “live things in You” . Rootworkers and Conjurers alike, seem to profoundly believe that it’s possible to cause animals such as snakes , insects, lizards to live inside someone’s body by means of “magickal poisoning” . Simply put, victim is fed with animal curios or powders, most often without their knowledge, and doing so being inflicted with a specific type of crossing condition called “live things in You” or simpler “live things”. Folk of Southern States will swear they’ve witnessed animals crawling under one’s skin, of those crossed, hoodooed, or cursed unfortunate individuals. In such case, they say, orthodox medicine cannot help, so the help of the root doctor ( as opposed to medical doctor ) is sought. And the rootdoctors or conjurers shall in such case prescribe versatile methods of removing this simple condition, be them simple as spreading some lard mixed with the milk of a black cow on anus, or be them as serious as making incisions and drawing blood.
Among people of Balkan peninsula, there is a similar belief still kept alive at remote mountain villages, that certain animal curios can cause, if ingested due to neglect or simple mind-slip, infection by living smaller animals or serpents. Typical example would be drinking from sprig in which horse’s hair has recently fallen in ( naturally ) , which causes snakes to live inside drinkers body. The methods of removing such “parasites” include making noises with metal dishes and dressing someone’s body with milk of a black animal, placing egg inside their mouths to draw snakes out, all often accompanied by shouting incantations. The apparent difference between Hoodoo and Eastern European people, regardin’ these beliefs, seems to be that Eastern Europeans mostly believe that infection with live things can not be caused intentionally.
Hoodoo people seem to have “inherited” this belief from Native American Indians, for this belief is prominently present in most of the Indian tribes and different traditions. Indians have always used things as frog spawns, eggs, snake eggs, animal hair to magickaly “poison” their enemies, often causing things to live inside them. However, admitably by some of very Indian witchdoctors themselves , they would often use tricks to make it seem as this phenomenon/condition took place. For example, they would dress someone’s but cheeks with mixture of honey and some chewed- up herbs, and as they finish the chants, would cunningly release the insects , previously hidden in their hands or down their sleeves. For people it was easy to believe that those animals came from inside of the affected person’s body.
In my humble opinion, it could have been that these beliefs of small animals living in someone’s body, developed simultaneously in various parts of the world. Let’s not forget that all up to late middle ages it was ( medically ) believed that various human infections are caused by small lizards or spiders living inside patient’s blood, and that the blood drawing from neck artery was standard medical procedure as well as skull perforation.
Some folklorist believe that most of such superstitions ( related to “live things inside You” ) are merely an urban legend based on some metaphorical elements of Indian or old European superstations, fueled and perpetuated by people that see it as a good chance to earn some money out of it, or scare their children from taking alcoholic beverages from strangers and suspicious people.
On the other side, many experienced and respected conjurers attest the existence of phenomenon, just not it’s frequency, to phrase myself that way. Simply put, it happens, it’s quite nasty ( from what I’ve heard, and read ), but I’s not common at all, rather actual cases are quite rar e.
Hence, it is very important for professional spiritual worker ( one that does work for others/clients ) to know how to fight or undo such condition, and bring forth healing and peace at once, for ( should I even state the obvious ) it’s excruciating and very agonizing experience.
Dealing with the condition and removing it
Throughout the years, being keenly inquisitive about the condition, I’ve encountered many methods of removing live things from someone. While very versatile, those methods , they all seem to have one common goal, expelling the live things out. So perhaps instead of uncrossing, such methods could be seen as exorcism methods ( in occult sense of the word, not religious ! ) even though they are still apotropaic methods nevertheless.
Rootworkers most commonly use roots fort this ( what a surprise lol ) often in combination with some method of making person throw up, or drawing their blood. Sometimes, potions are given for victims to ingest, which have emetic properties, be it in magickal or medicinal sense of the word.
For example, there a method combining roots and blood drawing described in entry in Haytt’s “Folklore in Adam County, Illinois” where a man was inflicted with a living lizard and beetle in his arm. Conjure doctor tied a piece of cord, very firmly, around his arm, chewed up “some root” and spit it out in bottle. Then the root doctor drawn the blood from man’s arm, by making incision on it, then collected it in the same bottle, where he had previously spat up the roots. The members of the afflicted man’s family were strongly suggested not to inspect the content of the bottle until the root doctor would return the next day. When the root doctor came back he showed them the contents of the bottle, just to see a lizard and beetle inside. The afflicted man had gotten well since then, according to the entry , in the mentioned work. 
Now the roots that rootworker used in the story could have been anything really, but most commonly used are
• Poke root
• Black cohosh and
• Galangal , known also as Small John da’ chew root, or Courtcase root, ingredient of courts case and sometimes Justo Juez and African Ju Ju oil
I would not chew the Poke root too long though emetic , very strong as to that
Now, of course rootworker from the story could have been using something else at the time, but the metioned roots are best choices to use in removal of live things. They can be brewed into some sort of potions, alone or with other ingredient such as alum and black cohosh for example. I’ve even read of using saltpeter and olive oil in combination with certain root, and giving this to sick person to ingest. 
Now, as I have mentioned somewhere at the beginning of the article black cow’s milk is another ingredient commonly used , often in salves or ointments used on rectum area, and in such case live animals can be drawn out through the very mentioned area.
A Santeria friend shared with me a method, that according to them anyone can try, as it’s safe and gives very good result, especially if undertaken sooner after supposed magical “infection” with live things. What You need is
• Smaller container of consecrated water
• Black hen’s egg, and
• Broom, preferably new, or the one You use in ritual cleansing
The “patient” is prayed over, for healing, while often cross marks are made over them with broom, as the Santeria practitioner prays. He or she then rolls the black hen’s egg over the whole body of the afflicted, thoughtfully as much as the occasion allows. Some of the consecrated water is then used to sprinkle clean white sheets in which the person is wrapped in. The eggs Is then broken and the contents released into the container with the remaining water. Blood or smaller animals may appear from the egg, nevertheless the whole content is disposed of, safely, burring, burning or flushing down the toilet.
My friend that shared the method with me, noted that he learned as it as a “folk cure” , not some method we could notably call Santerian. 
There is a method, noted as Hoodoo, but with questionable origins and even
source  ( though seems Hoodoo-sih to be honest ) used for expelling any foreign substance or things from body. Supposedly even live things. The “patient” is to ingest a mixture of its own urine and salt, while themselves or some conjurer is praying over them for expelling of foreign substance or thing or whatever. Something along these lines could be used as suitable words of power , composed by myself :
“Lord Christ, You had miraculously healed many, removing their plague, or demons from them. You have saved humans from damnation , sacrificing Yourself for us. Help me Lord, I cry to You, hear my prayer and release N.N. from afflictions. Remove anything impure, wicked from N.N.’s body, and heal lord. Expel any foreign matter and influence from N.N. in whatever form they might have, and let them never return. Like You removed the Legion, like You healed the lepers , and restored the sight to blind, heal and restore to pure and healthy state N.N. once again. Have mercy upon us, weak humans, for we trust in You Lord, deliver us and save us, as You have always done! And we will praise You every day, for Your infinite love and grace towards us, eternal glory to Father ( + ), Son ( + ) and Holy spirit ( + ) Amen !!!”
Now please note that removing live things from someone , if You are to ever find oneself before such task, is very complex and with very uncertain outcome, for its serious affliction that can sometime result in fatal outcome. Spiritual workers are either trained well for such work or they might have what they call “cure hand” , meaning a gift to heal such and alike conditions, as described in one particular case here
Courtesy of Southern Spirits website proprietor .
Please have all that in mind before trying to help someone, If You do not see Yourself competent, or If You have the slightest doubts, contact a professional rootworker
Hopefully thought, this was tad ghastly , but informative article
NOTES: This article was composed and written by myself, so If You wish to use any part of it elswhere, feel free as long as You provide credits ; Shadow of Shadows magick place, Shadowfirstname.lastname@example.org or a direct link to this post
CREDITS:  " Folklore from Adam County Illinois " Harry Middletone Haytt, enetry no  Some recipes with Black Cohosh , Alum and other mentioned, regarding classical rootwoork can be found, detailed in "Hoodoo herb and root magic" by Catherine Yronwode,  Informant's contribution, thanks Serp ;)  source of the infromation is unclear, as the method description can be found on various places online, in public domain
IMAGES , the second image showing Black Cohosh plant is from 123rf.com, used here for illustrative purposes only , with no ill will, the first image is my own humble scrible :)
Many Blessings, Shadow !!