Why Do We Get Hemorrhoids?

why do we get hemorrhoidsIt is difficult to get a handle on the prevalence of hemorrhoids since they can come and go. Many patients will find relief from over the counter and home remedies, but some will be so miserable they will seek help from a health care practitioner. Hemorrhoids tend to be a sensitive subject. People just don’t like to talk about them.

A Delicate Topic Defined

Hemorrhoids can form above and below the rectal sphincter. If you can imagine, hemorrhoids are like varicose veins in the rectum. The veins weaken and swell. If the swollen veins are located above the rectal sphincter, they may cause few problems, but you might see bright red blood in the stools if they happen to bleed. Hemorrhoids above the rectal sphincter may begin to cause pain if the tissue prolapses which means it falls below the rectal sphincter.

Hemorrhoids can also form outside of the anus below the rectal sphincter. These hemorrhoids tend to cause the most problems with pain and itching. They can also bleed. It is possible the pooling of the blood in the swollen veins may cause a blood clot or thrombus to form. The common name for hemorrhoids, “piles” (from Latin pillae meaning balls), comes from the observation of the small balls these clots form in the swollen veins.

What Causes Hemorrhoids?

Why hemorrhoids form is still a mystery. Hemorrhoid formation may be associated with standing or sitting for long periods of time, obesity, and straining while defecating with constipation or diarrhea. They also often occur during pregnancy, though it is not clear whether it is caused by the added pressure to the pelvic region by the baby, the changes in hormones that occur during pregnancy, the straining which occurs at delivery, or perhaps a combination of all of these.

Some say that being human and walking on two feet is a risk factor for hemorrhoids; however, this is not a health issue that only occurs in humans. Dogs, cats, horses, cattle, and sheep have all been identified to suffer from hemorrhoids on occasion. Moreover, a rat model for hemorrhoids was easily created by exposing the rat’s anal tissues to an irritating oil.

Along with the cause of hemorrhoids, a number of trends have yet to be explained:

  • There may be a hereditary component in some families
  • Women with hemorrhoids during their first pregnancy often have them again in subsequent pregnancies, but the hemorrhoids then disappear once the baby arrives
  • They don’t seem to occur in the young or in the elderly

The Role of Hormones

How hormones play a role in the formation of hemorrhoids is complicated. For example, constipation is a symptom of low thyroid function. Connective tissue weakness is also a sign of low thyroid. Is constipation the direct cause of hemorrhoid formation? Is there some innate laxity in the tissue associated with hypothyroidism that causes them to form? Or perhaps a combination of both?

As early as 1942, a theory existed that proposed the high levels of progesterone and estrogens that occur during pregnancy may contribute to the formation of varicosities in the legs and also to hemorrhoids:

  • Increased progesterone was thought to be responsible for decreased tonicity in the vascular walls of the veins
  • Increased estrogens were thought to increase blood volume putting greater stress on venous blood circulation and leading to increased stagnation and pooling of the blood

However, as Dr. de Barros and his colleagues point out in their paper, “Pregnancy and lower limb varicose veins: prevalence and risk factors,” this does not account for the fact that varicosities can occur in one leg and not the other under the same hormonal control.

Confounding Observations

Interestingly, not all studies show the same results with regard to hemorrhoid risk factors. A September 2015 study published in PLOS ONE revealed a lower risk of hemorrhoids with a high fiber diet as have other studies. However, the reduced risk was not associated with less constipation, and the number of pregnancies a woman experienced did not affect the risk one way or the other. Surprisingly, being sedentary even correlated with a decreased risk.

Hemorrhoid Treatment

Hemorrhoids may come and go without a clearly identified cause or remedy. However, when hemorrhoids and the associated pain become serious, most seek help from a professional. Surgical procedures such as cauterization (burning) and ligation (banding or clipping) are part of the practitioner’s medical bag to bring relief. As welcome as the relief may be, these procedures do not prevent hemorrhoids from returning and do not address the underlying cause.

Numerous home remedies may also bring some relief:

  • Apple cider vinegar and witch hazel are astringent and may help relieve the swelling.
  • Hydrocortisone and even progesterone creams applied to the area may relieve inflammation.
  • Whether or not constipation is a cause of hemorrhoid formation, more fiber, more hydration, and any techniques to create softer stools are likely to reduce irritation to the tender tissues.
  • Soaking in warm bath water or a sitz bath may ease the pain, and Epsom salts can be added for additional magnesium.
  • Cold packs may be used to help reduce inflammation and shrink the hemorrhoids.


It’s astonishing something as common as hemorrhoids still poses such a mystery to the medical community. Researchers are working diligently to find the answers to our questions about hemorrhoids. Hopefully, these answers will come soon. Hemorrhoid prevention will bring great relief to many.

The information on this website is for informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding any condition or medication. Do not disregard professional medical advice or delay in seeking it because of something you have read on this site.
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