Very few people ring a clinic the week their symptoms start. The far more common pattern is two or three years of quiet management — a cream from the chemist, a bit more fibre, a mental note to do something about it — punctuated by the occasional bad fortnight. Somewhere in that period the question surfaces: is this actually doing me any harm, or am I just putting up with something unpleasant? It is a fair question and it deserves a straight answer rather than either the reassurance that it is nothing or the scare story that it will ruin your health. The honest version is in the middle. Haemorrhoids very rarely become dangerous. They do, in a meaningful proportion of people, become entrenched — and the cost of leaving them is usually measured in narrowed options and years of low-grade nuisance rather than in emergencies. This page goes through what is actually known about what happens when piles are left alone, what is genuinely possible as a complication, what is not, and where the line sits between reasonable waiting and waiting too long.
First, the Thing People Are Really Worried About
Haemorrhoids do not turn into cancer. They are not pre-cancerous, they do not become malignant over time, and having had them for a decade does not raise your risk of anything in the bowel. That is worth stating plainly because it is the fear sitting underneath most of the searching that brings people to pages like this one. But there is a real risk hiding in the neighbourhood of that reassurance, and it is not the one people expect: the risk is that a confident self-diagnosis of piles becomes the explanation for every symptom for years, including symptoms that were never haemorrhoidal in the first place. Bowel cancer can and does present with rectal bleeding, and the single most common reason a diagnosis is delayed is that the bleeding was attributed to piles by the patient, and sometimes by a clinician, without anyone looking. So the danger of leaving haemorrhoids untreated is less about the haemorrhoids themselves and more about what you might be talking yourself out of investigating. Our comparison of haemorrhoids or bowel cancer sets out how the symptom patterns differ, and it is the first thing to read if anything about your bleeding has changed.
Do They Actually Get Worse, or Is That Just Marketing?
Both things are true, which is why the answer is muddled. Internal haemorrhoids are graded one to four by how far they prolapse: grade 1 stays inside, grade 2 comes down on straining and goes back by itself, grade 3 comes down and has to be pushed back, and grade 4 stays down. Progression up that scale does happen, and the mechanism is straightforward — the connective tissue anchoring the anal cushions stretches and does not spring back, so each episode of straining leaves slightly less support than before. But it happens over years, not weeks, and plenty of people sit at the same grade for a decade without moving. There is no clock ticking and no point at which a grade 2 tips inevitably into a grade 3. What is much more reliably true is that the things that caused the haemorrhoids in the first place — constipation, chronic straining, long sitting, heavy lifting — carry on doing their work unless they change. Leaving the haemorrhoid alone while also leaving the cause alone is the combination that produces progression. Our article on why haemorrhoids keep coming back covers that cycle in detail.
Iron Deficiency From Slow, Steady Blood Loss
This is the complication people least expect and the one most worth knowing about. A small amount of bright red blood on the paper each time you go looks trivial, and any single episode is. Repeated daily or several times a week over months, it adds up to a slow drain on iron stores, and the body compensates quietly until it cannot. The symptoms that result are not bowel symptoms at all: tiredness that sleep does not fix, breathlessness on stairs you used to manage, pallor, headaches, brittle nails, sometimes a strange craving for ice. Because none of that points at the back passage, people often spend a long while investigating the fatigue before anyone connects it to bleeding haemorrhoids they had long since stopped mentioning. Significant anaemia from haemorrhoids is not common, but it is well documented and it is entirely preventable. If you have been bleeding regularly for months and you feel persistently tired, a blood test from your GP costs nothing and settles it. Our guide on bleeding haemorrhoids covers what different bleeding patterns mean.
Thrombosis: The Bad Week That Arrives Without Warning
A thrombosed haemorrhoid is a blood clot forming inside a pile, and it is the closest thing to an acute event in this field. It announces itself as sudden, severe pain and a tender blue or purple lump at the anal margin, often after a bout of constipation, a long drive, a heavy lifting session or, classically, for no reason anybody can identify. It is not dangerous and it is not an emergency in the medical sense, but it is genuinely painful for three or four days before easing over the following one to two weeks. Leaving haemorrhoids untreated does not cause thrombosis, exactly — it just leaves the tissue there for it to happen in. If it is going to be treated surgically, that has to happen within the first day or two, which is why people who have had one usually remember the scramble to be seen. Most resolve on their own with cold compresses, painkillers and stool softeners, and many leave behind a painless skin tag that is permanent, harmless and does not need removing.
Strangulation and the Genuine Emergencies
The rare end of the spectrum deserves an accurate description rather than an alarming one. A grade 4 haemorrhoid that is permanently prolapsed can, uncommonly, become trapped by the anal sphincter tightening around it, which cuts off its blood supply. That is a strangulated haemorrhoid, and it presents as severe constant pain, a lump that will not go back no matter what you do, and sometimes a darkening of the tissue. It needs same-day assessment, and occasionally emergency surgery. Ulceration of prolapsed tissue, and in rare cases a spreading infection in the area, sit in the same category. These outcomes are uncommon enough that they should not be the reason anybody books an appointment — but they are the honest answer to what the worst case actually looks like, and they only occur at the far end of a long progression. If you have severe unrelenting pain, a lump you cannot reduce, fever or feeling unwell alongside it, that is an urgent care or A&E matter rather than a clinic booking.
The Slow Erosion Nobody Counts as a Complication
What actually happens to most people who leave it is far more mundane and, cumulatively, more expensive than any of the above. Piles that prolapse tend to leak mucus, because tissue that belongs inside the anal canal cannot form a proper seal when it is sitting at the opening. That produces damp underwear, occasional soiling, and the itching and soreness of pruritus ani, which then gets scratched and inflamed and becomes its own problem — our guide to an itchy bottom at night covers that cycle and why it is worse after dark. Chronic straining alongside piles frequently produces an anal fissure, which is a different problem needing different treatment and which hurts considerably more. Skin tags accumulate and make hygiene harder. Then there is the part that does not appear in any clinical list: the planning. Choosing seats, mapping toilets, declining the long walk, carrying wipes, avoiding certain clothes, not sitting through a film. People normalise all of it and only notice how much room it was taking up once it stops.
Waiting Narrows the Menu
This is the practical cost of delay and the one least often spelled out. The treatment options available to you depend heavily on grade. Grade 1 and grade 2 internal haemorrhoids respond well to office-based procedures — banding, sclerotherapy, electrotherapy — which are short, done without a general anaesthetic, and followed by little or no time off. Grade 3 can often still be managed that way but with a higher chance of needing repeat treatment. By the time haemorrhoids are permanently prolapsed, the realistic options shift towards the surgical end: haemorrhoidal artery ligation, stapled procedures, or an excisional haemorrhoidectomy, which is effective but has a recovery measured in weeks rather than days and is one of the more painful routine operations in general surgery. Nothing about that is a reason to panic-book. It is a reason to understand that the version of this problem you have now is probably the easiest version of it you will ever have to treat, and that the cheapest, gentlest options are the ones with a shelf life. Our overview of non-surgical haemorrhoid treatments compares what each one actually involves.
When Leaving It Alone Is the Right Call
Plenty of haemorrhoids should be left alone, and any clinic that tells you otherwise is selling rather than advising. A first episode, a flare during or after a period of constipation, piles that appeared during pregnancy, or symptoms that are mild and intermittent are all reasonable things to manage conservatively and watch. A great many settle on their own once the cause is removed; our article on how long do haemorrhoids last sets out the usual timelines. Give conservative management a proper try rather than a half-hearted one before concluding it has failed — that means a real increase in fibre intake built up gradually, enough fluid, not sitting on the toilet with your phone, not straining, dealing with constipation promptly, and getting up regularly if you have a desk job, because sitting all day is a genuine contributor. Six to eight weeks of doing that properly is a fair test. Piles that came on during pregnancy or after birth are their own case and deserve time: we treat from six weeks after delivery and once the midwife has signed you off, and a substantial number of people who would have booked early no longer need anything by then. Our guide to haemorrhoids after childbirth explains why.
The Point at Which Waiting Stops Being Reasonable
There is no official threshold, but there are useful markers. Symptoms that have not meaningfully changed after two months of genuine conservative effort are unlikely to change in the third month for the same reasons. Bleeding every time you open your bowels, rather than occasionally, is worth having looked at. A lump that has started needing to be pushed back when it used to go by itself is a change in grade and therefore a change in what will treat it easily. Mucus, soiling or itching that is persistent rather than occasional indicates prolapsing tissue. Symptoms that are shaping your week — what you wear, where you sit, whether you go — have crossed from nuisance into cost. And any new bleeding after the age of about fifty, bleeding mixed through the stool rather than on its surface, dark or black stool, a change in bowel habit lasting three weeks or more, unexplained weight loss or abdominal pain should be seen promptly and should not be filed under piles, regardless of whether you have piles as well. Having haemorrhoids does not protect you from having something else at the same time.
Why People Wait, and Whether Those Reasons Hold Up
The reasons are consistent and almost entirely understandable. Embarrassment comes first, and it is worth saying that whatever you are imagining about the examination is almost certainly worse than the reality — it takes a few minutes, the clinician has done it thousands of times, and a chaperone is present throughout. Our walkthrough of what happens at a haemorrhoid appointment describes it step by step, precisely so that the unknown part stops being the obstacle. Second is the hope that it will resolve, which is reasonable for a few weeks and progressively less so after that. Third is the assumption that the only alternative is surgery, which has not been true for decades. Fourth is NHS waiting times, which for a benign, non-urgent condition can be long, and which our comparison of NHS or private haemorrhoid treatment addresses honestly, including the circumstances in which waiting for the NHS is the sensible choice. Fifth is cost, which is a real constraint and not something to be argued away — but it is worth knowing what the numbers actually are before deciding, because people frequently assume a figure several times higher than the real one.
What Treatment Involves Here, Stated Plainly
We assess and treat internal haemorrhoids with eXroid electrotherapy. A proctoscope is inserted into the anal canal, and a low-dose direct current is applied to the base of the haemorrhoid above the dentate line, which closes off the vessel feeding it so that it shrinks over the following one to four weeks. There is no cutting, no stitching, no general anaesthetic, no fasting and no bowel preparation, and most people go back to normal activity the same or the next day. Up to three haemorrhoids can be treated in a single session. Two things we will not soften: it is uncomfortable, and a fair number of patients describe it as properly painful while it is being carried out — it is short, usually settles within about ten minutes of finishing, paracetamol beforehand helps, and the current can be turned down at any point, but nobody here will call it pain free. And you may need more than one treatment. How many cannot be predicted from an examination, outcome is not guaranteed, and complete clearance is not always possible; most patients need one to three treatments to reach their own goal. NICE has given positive guidance for grade 1 to grade 3 internal haemorrhoids. Grade 4 was not included because there was insufficient evidence at the 2018 review, and the equipment is approved in the United States for all four grades — anyone compressing that into "NICE-approved for all grades" is overstating it.
What This Service Does Not Treat
Being explicit about this saves wasted journeys, and it matters more than usual for people who have left things a long time, because long-standing cases tend to accumulate more than one problem. This service assesses and treats internal haemorrhoid disease only. It does not treat purely external haemorrhoids, anal skin tags, fissures, fistulae or polyps. If you attend and the examination shows the main problem is a fissure or a tag rather than internal piles, you will be told so and advised or referred onward — that is a legitimate result of the appointment, not a failed one. Where a fissure is present but you can tolerate the examination, the haemorrhoids can usually still be treated on the day; where the examination is too painful to complete, the fissure is treated first and the return visit is free of charge. There are also contraindications that rule treatment out, including pregnancy, a pacemaker or defibrillator implant, a bleeding disorder, active anorectal infection and active inflammatory bowel disease, and if treatment does not go ahead the treatment portion of the fee is refunded. If banding, surgery or simply carrying on as you are is the better fit for your situation, we would rather say so.
A Reasonable Way to Decide
If you have had symptoms for under a couple of months, treat the cause properly for six to eight weeks and see where you are. If you have had them for years, the waiting has already told you what it is going to tell you, and the useful next step is finding out what you actually have rather than buying another cream — because internal haemorrhoids, a fissure, a skin tag and a prolapse need four different things and routinely coexist. If anything in your symptoms has changed recently, see someone regardless of how long it has been. Our severity test takes a couple of minutes, costs nothing and gives an indication of where you sit, though grade can only be established by examination. For reference, a consultation with examination is £365, consultation and treatment together on the same visit is £1,095, which is what most people book, and a follow-up treatment if one is needed is £795; our breakdown of haemorrhoid treatment cost puts that alongside the alternatives. We see patients at Blythswood in Glasgow and on Wardour Street in London, the service is self-referral so you do not need a GP letter, and a report can be provided for your GP afterwards. And if the answer for you turns out to be more fibre and a bit more time, that is a perfectly good answer, and it is one we give regularly.
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