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What happens if worms are left untreated in humans?

Author

James Craig

Published Jan 08, 2026

In rare cases, if the infestation is left untreated, pinworm infections can lead to a urinary tract infection (UTI) in women. Pinworms can also travel from the anus into the vagina, affecting the uterus, fallopian tubes, and other pelvic organs. This may result in other infections, including vaginitis and endometritis.

Can worms go away on their own?

Threadworms do not go away by themselves, and people do not build up immunity to them, so they must be treated in order to eradicate them totally from the body.

What happens if you don't treat worms in humans?

Severe or persistent threadworm infections can cause: loss of appetite. weight loss. skin infection around the anus if bacteria enter any scratches caused by itching – wearing cotton gloves while sleeping may help prevent this.

Can worms be life threatening?

Visceral leishmaniasis requires immediate treatment because it can be lethal. This disease is caused when humans consume the eggs of the tapeworm Taenia solium from contaminated water or food. People can also become infected with an adult tapeworm if they consume undercooked infected pork.

How long can you leave worms untreated?

The worms will die after 6 weeks so provided you do not swallow any new eggs then no new worms will grow to replace them. Strict attention to hygiene should be sufficient.

20 related questions found

How can I tell if I have worms?

Most of the time, there aren't any. You might have anal itching, especially at night. You could also have stomach pain, nausea, or vaginal itching. Sometimes pinworms can be seen around your anus or on your underwear or bed sheets about 2 to 3 hours after you've gone to bed.

What poop looks like when you have worms?

Sometimes the worms are visible in the anal area, underwear, or in the toilet. In stools, the worms look like small pieces of white cotton thread. Because of their size and white color, pinworms are difficult to see.

How long can worms live in a human?

Adult worms may live up to 17 years in the human body and can continue to make new microfilariae for much of this time.

How do you know if you have worms in your lungs?

The first sign of an infection might be seeing a live worm in your vomit or poop. If the larvae have traveled to your lungs, you may get a sickness similar to pneumonia, with: Wheezing. Cough.

What is the deadliest parasite to humans?

Pork tapeworm: Taenia solium

Sometimes larvae cross the blood-brain barrier and enter the central nervous system (CNS), where the embryos develop into fluid-filled cysts leading to a condition known as neurocysticercosis which results in seizures and is one of the most dangerous parasitic CNS infections worldwide.

Can you have worms for years?

In some cases, you will pass a worm in your stool during a bowel movement. Some people may have intestinal worms for years without experiencing any symptoms.

What happens if pinworms go untreated?

In rare cases, if the infestation is left untreated, pinworm infections can lead to a urinary tract infection (UTI) in women. Pinworms can also travel from the anus into the vagina, affecting the uterus, fallopian tubes, and other pelvic organs. This may result in other infections, including vaginitis and endometritis.

Why does it feel like I have worms in my bum?

Pinworms are tiny, white, thread-like worms that live in the rectum. The worms crawl out of the anus (bum) at night and lay their eggs on nearby skin. Pinworms can be uncomfortable but they do not cause disease. People who have pinworms aren't dirty.

How do you deworm a human?

A single dose of albendazole (400mg) or mebendazole (500mg) can be given to prevent parasitic infection in adults. In the case of pregnant women, deworming medication is given after the first trimester. The medication is given twice a year in regions where the predominance of parasites is more than 50%.

Can worms cause back pain?

Patients may present with typical symptoms such as back pain, numbness, weakness, or bowel/bladder incontinence, leading the clinician to order relevant imaging of the CNS. In cases of parasitic infec- tion, there is seldom a diagnosis made even after imaging identifies the underlying lesion.

Can worms cause coughing in humans?

Worms then travel from the belly into the chest. There they can cause respiratory symptoms, such as: Cough. Shortness of breath.

Can worms live in your throat?

The larvae typically make their way down to your stomach or intestines. There they can cause inflammation or damage. You can also have allergic reactions to these worms. Rarely, the larvae can stay in your throat area and that's when you may develop “tingling throat syndrome” and potentially a cough.

Do worms make you hungry?

That's because the worm can irritate your bowels when it attaches to them with its circular suckers (and, in some cases, its movable hooks). Though the parasite does absorb some of your digested food through its skin, it won't eat enough to make you hungry.

How do worms get inside your body?

You get it by eating infected meat, especially pork, that's raw or undercooked. When a person eats infected meat, stomach acid dissolves cysts in the meat to release worm larvae. The worms go to the intestine, grow up, mate, and lay eggs. After hatching, young worms go through the blood to the muscles.

Do worms move in stool?

It often lives in human feces (poop). People catch it through hand-to-mouth contact. If you have a roundworm infection of your intestines (ascariasis), you may not have symptoms. You may see live worms in your poop though.

Do all humans have worms?

Thanks in part to modern plumbing, people in the industrialized world have now lost almost all of their worms, with the exception of occasional pinworms in some children. Intestinal worms are properly called “helminths,” which most dictionaries will tell you are parasites.

How long can you have Threadworms without knowing?

According to one consultant physician, threadworm infestation is as common in children as head lice and affects most families at some time. Threadworms usually produce no symptoms except an itchy bottom. In fact, people may harbour them for years without realising it.

What is the best worming tablets for humans?

Mebendazole is a type of medicine for treating worms. It is used mainly for infections of the gut such as threadworms (sometimes known as pinworms) and other less common worm infections (whipworm, roundworm and hookworm). You can buy mebendazole from a pharmacy. It's also available on prescription.

What to do if you think you have worms?

Treatment to get rid of worms

If you have worms, a GP will prescribe medicine to kill them. You take this for 1 to 3 days. The people you live with may also need to be treated. Any worms in your gut will eventually pass out in your poo.