Colonic Irrigation FAQ – Your Questions Answered

Colonic irrigation, also known as colon hydrotherapy, is a procedure in which filtered, temperature-controlled water is gradually introduced into the large intestine through the rectum.

Water then leaves the colon through specialist equipment together with bowel contents and gas. At Parkland Natural Health, we use a closed, gravity-fed system, and your therapist stays with you throughout the procedure.

Yes. Colonic irrigation and colon hydrotherapy generally describe the same procedure. You may also hear terms such as a colonic, colon cleanse or colonic lavage.

At Parkland Natural Health, we normally use the terms colonic irrigation and colon hydrotherapy.

We use a closed-system, gravity-fed colon hydrotherapy system. Filtered water enters gradually through the equipment while water and bowel contents leave through separate enclosed tubing.

Because the system is closed, waste remains contained within the equipment. Your therapist remains present and can adjust the treatment according to your comfort and response.

Your appointment begins with a consultation and suitability check. Your therapist explains the procedure and gives you the opportunity to ask questions before treatment begins.

Once you are comfortable and covered for privacy, a small disposable speculum is gently inserted into the rectum and connected to the enclosed treatment tubing. Filtered water warmed to approximately body temperature is gradually introduced into the colon. The therapist controls the treatment and may use gentle abdominal massage where appropriate.

Water, gas and bowel contents leave through the closed system. Communication continues throughout the session, and treatment can be adjusted, paused or stopped whenever necessary.

See the appointment step by step →

Yes. We provide therapist-administered closed-system colon hydrotherapy, so your therapist remains with you during treatment.

This allows the therapist to monitor your comfort, control the water flow and temperature, communicate with you and use abdominal massage where appropriate.

We use filtered water warmed to approximately body temperature. Water temperature and flow are controlled throughout the treatment and can be adjusted according to your comfort.

No laxative or bowel-cleansing medication is required as part of an ordinary colon hydrotherapy appointment.

Colonic irrigation should not normally be painful. The sensations can feel unfamiliar during a first appointment, and some people experience temporary fullness, pressure or mild abdominal cramping while the bowel responds to the water.

Your therapist monitors your response and can reduce the flow, pause or stop treatment if you feel uncomfortable. Please tell your therapist immediately if you experience pain.

This is one of the most common concerns among first-time clients.

The appointment is conducted privately and professionally. Once the small tube has been inserted, you remain covered. Because we use a closed system, bowel contents pass directly through enclosed tubing rather than into an open container.

Your therapist performs these procedures professionally and routinely, with particular attention to privacy and dignity.

You do not need any previous experience or knowledge of the procedure.

Your therapist will explain each stage before treatment begins, review your health questionnaire and answer your questions. You will be guided throughout the appointment and can ask to slow down, pause or stop at any stage.

A quick tip: don’t drink any liquids two hours before your procedure. Besides, do not take laxatives or drink coffee before and after treatment. However, you don’t need to fast before or after visiting us.

You can eat normally, although many clients prefer not to have a particularly heavy meal immediately before the appointment. If a laxative is part of prescribed medical treatment, do not change prescribed medication without appropriate medical advice; contact us before your appointment if you are unsure.

No. You do not need to have a bowel movement before treatment.

If you naturally need to use the toilet before your appointment, that is perfectly fine, but it is not a requirement.

Allow about 60 minutes for a standard appointment, including consultation, preparation, colon hydrotherapy and aftercare. The hydrotherapy part itself commonly takes around 30–45 minutes, although every client responds differently.

Some specialist extras can extend the appointment. Your therapist does not try to achieve a particular quantity of cleansing within a fixed time; treatment is adapted according to your comfort and response.

Responses vary. Many clients continue their normal activities immediately after treatment.

You may notice temporary changes in bowel activity during the hours afterwards. Some people have another bowel movement relatively soon, while others may not have one until later or the following day.

Mild abdominal activity, temporary tiredness or feeling slightly chilled can occasionally occur. Persistent or concerning symptoms should be appropriately medically assessed.

Yes. You can normally eat after colon hydrotherapy.

Many people prefer a moderate, easily digested meal and normal fluids afterwards rather than a very heavy meal or excessive alcohol. There is no requirement to follow a special detox diet after treatment.

Usually, yes. Most clients are able to continue normal daily activities, including returning to work.

If it is your first treatment and you are unsure how you will feel afterwards, you may simply prefer to leave yourself a little extra time rather than arranging a very tight schedule.

Bowel patterns can temporarily vary after treatment. Some people have another bowel movement during the following few hours, while others may notice a temporary delay before their next bowel movement.

Persistent diarrhoea, significant pain, bleeding or other unusual symptoms should not automatically be assumed to be a normal consequence of colon hydrotherapy and should be medically assessed.

You can normally return to your usual routine. We generally suggest:

• drinking fluids normally;
• eating according to your appetite;
• choosing a reasonably light meal if your abdomen feels sensitive;
• avoiding excessive alcohol immediately afterwards; and
• paying attention to how your digestive system responds.

Your therapist can give you individual aftercare guidance at the end of your appointment.

No, and completely emptying the colon is not the aim of treatment.

Your digestive system is continuously functioning and receiving material from the small intestine. Responses to colon hydrotherapy differ from person to person, so judging a session simply by the amount of material released is not particularly useful.

There is no single number that is appropriate for everyone.

Some clients choose one appointment. Others prefer a short course or book periodically as part of their personal wellbeing routine.

Your therapist can discuss your objectives and previous experience, but you are under no obligation to purchase a course. Frequency should take account of your health, individual response and circumstances.

Medical research has examined repeated transanal irrigation in people with chronic constipation and/or faecal incontinence. A 2025 systematic review included 16 studies involving 1,567 people. Most observational studies reported some improvement in symptoms, quality of life or both, although only one underpowered randomised trial was available and the authors called for better-quality randomised research.

Scientific source: PubMed PMID 41168141 – Transanal irrigation: Bridging the gap in treatment for chronic constipation and/or faecal incontinence.

A 2026 prospective multicentre observational study enrolled 216 adults with functional constipation; 175 were prescribed transanal irrigation. During follow-up, researchers reported higher satisfaction with bowel function, better quality-of-life scores and lower constipation severity. No serious adverse events were reported, but the study was not randomised and relied on patient-reported outcomes.

Scientific source: PubMed PMID 42011892 – Transanal Irrigation in Functional Constipation: Long-term Results From an Italian National Study.

These are medical transanal-irrigation protocols and are not identical to professional colon hydrotherapy at Parkland Natural Health. We use this evidence as clinical context for repeated bowel irrigation, not as proof that a particular number of professional colonics will produce the same result.

The large intestine contains a complex microbiome. Colon hydrotherapy introduces water and removes water and bowel contents, but it would be misleading to claim that the treatment permanently removes the intestinal microbiome or automatically increases beneficial bacteria.

The gut microbiome changes continually and is influenced by diet, medication, health and lifestyle. If you have specific concerns about your microbiome or digestive health, discuss them with an appropriate healthcare professional.

Most nutrient absorption from food takes place earlier in the digestive tract, particularly in the small intestine. The colon plays an important role in water and electrolyte absorption and contains a substantial bacterial population.

Colon hydrotherapy should nevertheless be used appropriately rather than regarded as something that needs to be performed excessively.

Colon hydrotherapy may assist bowel evacuation during the appointment, and people often consider it when experiencing constipation, incomplete emptying, bloating or trapped wind. During treatment, controlled filling and release create normal sensations associated with bowel filling and the urge to empty, while gentle abdominal massage may support comfort and bowel emptying. Each session is adapted following health screening and consultation.

A 2026 systematic review and meta-analysis of abdominal colonic massage for chronic constipation included 54 studies, with 35 studies and 1,965 patients contributing to the meta-analysis. The authors reported improvements in bowel-movement frequency and quality of life after both manual and device-assisted massage. This is evidence about abdominal massage, not proof of the effects of colon hydrotherapy as a whole.

Scientific source: PubMed PMID 41919979 – Safety and Efficacy of Manual and Automated Abdominal Colonic Massage for Chronic Constipation.

Persistent constipation, regular bloating, blood in the stool, unexplained weight loss, abdominal pain or a sudden change in bowel habits should be medically assessed. NHS guidance on constipation lists these among reasons to seek GP advice.

For information about circumstances in which colon hydrotherapy may not be suitable, please see our Contraindications and Restrictions page.

Colon hydrotherapy should not be presented as a cure or medical treatment for IBS or other diseases.

Some people who have digestive concerns choose colon hydrotherapy as a complementary wellbeing treatment. However, symptoms associated with IBS can also occur with other gastrointestinal disorders, so persistent or unexplained symptoms should be appropriately medically assessed.

Certain gastrointestinal conditions are also contraindications to colon hydrotherapy.

Colon hydrotherapy has recognised contraindications, which is why appropriate health screening is important before treatment.

At Parkland Natural Health, we focus on hygiene, privacy, appropriate equipment, and clear communication throughout the appointment. We use a closed colon hydrotherapy system, filtered, temperature-controlled water and appropriate single-use treatment components.

Your therapist monitors your response throughout the session. No complementary therapy is completely risk-free, so it is important to provide accurate information about your medical history and medication before treatment.

Colon hydrotherapy is not suitable for everyone. Recognised contraindications include certain active inflammatory bowel conditions, bowel obstruction, some cardiovascular or kidney conditions, recent abdominal or bowel surgery, active rectal conditions and other medical circumstances.

We do not provide routine colon hydrotherapy during pregnancy. If you are pregnant or believe that you may be pregnant, please do not book a colonic treatment.

Please tell us about:

• diagnosed gastrointestinal conditions;
• previous abdominal, bowel or rectal surgery;
• heart or kidney conditions;
• medication, particularly anticoagulants;
• pregnancy;
• unexplained rectal bleeding;
• significant or unexplained abdominal pain;
• recent persistent changes in bowel habit; and
• other relevant medical conditions.

If suitability is uncertain, we may postpone treatment and recommend appropriate medical advice.

Read our full colonic irrigation contraindications guide →

Haemorrhoids are not automatically a contraindication. If they are not actively bleeding, severely painful or acutely inflamed, colon hydrotherapy may still be suitable following consultation and screening.

Please tell your therapist if you have haemorrhoids, recent rectal bleeding, significant anal pain, inflammation or recent treatment or surgery in the area. We may postpone treatment if the tissue is irritated or if bleeding or another symptom needs medical assessment.

For general medical information, see the NHS guidance on piles (haemorrhoids). The NHS advises medical review for concerning or persistent bleeding and significant pain.

If your suitability screening shows that colon hydrotherapy is not appropriate for you, we will not proceed with the treatment. If you have already paid for the appointment, we will issue a full refund.

The price depends on the appointment you choose. Parkland Natural Health offers a single first colonic appointment as well as enhanced treatments and multi-session packages.

Our website shows current clinic prices and online booking prices, along with real-time appointment availability.

View current colonic irrigation treatments and prices →

Parkland Natural Health is at 239 High Holborn, London WC1V 7EW, close to Holborn Underground station.

The clinic is conveniently located for clients travelling from the City, West End, Covent Garden, Bloomsbury and other parts of Central London.

Yes. You can view current appointment availability and book online without waiting for a call back.

For most new clients, One Colonic Irrigation Session Including Consultation is the simplest starting appointment.