Expert Diarrhoea Treatment That Restores Balance

Persistent diarrhoea disrupts daily life. Dr. Arun Rajendran offers
accurate diagnosis and personalised diarrhoea treatment in London
— helping you find fast, lasting relief.

10+

Year's experience

5*

Patient-rated care

Fast

Appointments available

Compassionate
Specialist Care

Gastroenterology London

Expert Diarrhoea Treatment That Restores Balance

Persistent diarrhoea disrupts daily life. Dr. Arun Rajendran offers
accurate diagnosis and personalised diarrhoea treatment in London
— helping you find fast, lasting relief.

10+

Year's experience

5*

Patient-rated care

Fast

Appointments available

Compassionate
Specialist Care

Gastroenterology London

IBS

Inflammatory Bowel Disease

Coeliac Disease

Bloating & Wind

Colonoscopy

Understanding Your Symptoms

About Diarrhoea

Passing loose, watery stools more than three times daily, diarrhoea is
classed as acute (up to two weeks) or chronic (four weeks or more).
Persistent symptoms warrant specialist assessment to identify the cause
and restore your digestive health.

Acute: Usually resolves within two weeks — often caused by infection or diet.

Chronic: Needs investigation to rule out IBS, IBD, or coeliac disease.

With the right diagnosis, most patients improve significantly and regain confidence.

Causes & Risk Factors

Common Causes of Diarrhoea

Understanding the causes of diarrhoea is the first step to finding
the right treatment.

Gut Infections

Bacterial, viral, or parasitic infections — often from contaminated food or water.

IBS

One of the most frequent causes of recurring diarrhoea — a functional gut disorder without structural damage.

Inflammatory Bowel Disease

Crohn's disease and ulcerative colitis cause chronic gut inflammation and persistent diarrhoea.

Food Intolerances

Lactose intolerance, gluten sensitivity, and coeliac disease all cause loose stools after certain foods

Medications

Antibiotics, magnesium antacids, and some laxatives are common culprits worth reviewing early.

Stress & Anxiety

The gut–brain connection is well established. Stress can speed up gut motility and trigger loose stools.

Recognising Your Symptoms

Symptoms of Diarrhoea

Knowing your symptoms helps determine when specialist diarrhoea treatment is
needed rather than managing alone.

Loose or watery stools

More than three bowel movements a day

Sudden urgency to use the toilet

Abdominal cramps and bloating

Nausea (in some cases)

Fatigue and low energy

Dehydration — thirst, dark urine, dizziness

Unintended weight loss

Anxiety about leaving home or eating out

Seek urgent advice if you notice:

Blood in stools · Black or tarry stools · Severe abdominal pain · Symptoms lasting over two weeks · Significant unintentional weight loss.

Restore Balance. Digest Well, Live Better.

You deserve clarity about your symptoms and a clear plan to move forward.

Book an Appointment Make an Enquiry

Getting to the Root Cause

Diagnosis

If symptoms have lasted more than two weeks — or include blood, pain, or
weight loss — specialist assessment is essential. Dr. Rajendran takes a full
history and arranges targeted investigations.

Detailed Consultation

Full review of symptoms, bowel habits, diet, medications, and family history.

Blood Tests

Full blood count, inflammatory markers, coeliac antibodies, and
nutritional screening.

Stool Analysis

Stool cultures or faecal calprotectin to detect infection or
gut inflammation.

Colonoscopy / Endoscopy

Camera investigation of the bowel where indicated, with
biopsies if needed.

Blood or mucus in stools

Unintentional weight loss (>5% in three months)

Diarrhoea that wakes you at night

New bowel habit change in anyone over 50

"Accurate diagnosis is the foundation of effective diarrhoea treatment."

Book An Assessment

Personalised Care

Diarrhoea Treatment - Your Options

Treatment is always tailored to your diagnosis — because what works
depends entirely on the cause.

Rehydration Therapy

Oral rehydration therapy replaces fluids and electrolytes lost through loose stools

Rehydration sachets (ORS) are first-line for mild to moderate dehydration

IV fluids reserved for severe cases

Treating the Underlying Condition

IBD: anti-inflammatories, immunosuppressants, or biologic therapies

Coeliac disease: strict lifelong gluten-free diet

IBS: low-FODMAP diet, gut-directed CBT, or targeted medication

Medications for Diarrhoea

Anti-diarrhoeal medications such as loperamide for short-term relief

Antibiotics where bacterial infection is confirmed

Antispasmodics to relieve cramping and urgency

Ongoing Support

Regular follow-up to review progress and adjust your plan

Flare-up management plan so you know what to do

Dietitian referral and nutritional support where needed

Self-Care & Wellbeing

Diet & Lifestyle Tips

Small, consistent changes alongside medical treatment can
make a meaningful difference.

Dietary Tips

Bland foods — toast, rice, and plain chicken are often the best food for diarrhoea recovery

Avoid spicy, fatty, or processed foods during a flare-up

Limit dairy if lactose sensitivity is suspected

Keep a food diary to identify personal triggers

Hydration

Drink at least 2 litres daily — more if symptoms are active

Oral rehydration sachets replace lost electrolytes

Avoid sugary fizzy drinks and undiluted juices

Sip steadily throughout the day

Lifestyle

Manage stress — it is a significant gut trigger

Establish regular mealtimes to support gut motility

Prioritise sleep — poor rest worsens gut sensitivity

Always speak to Dr. Rajendran before stopping medication

Your Care, Your Way

Why Choose Dr. Arun Rajendran?

Expert, friendly, and effective private gastro care — because you deserve
more than a rushed appointment.

Accurate Diagnosis First

Thorough investigation before treatment, with a clear explanation in plain English.

Personalised Treatment

Every plan is built around your specific diagnosis and lifestyle — not a generic protocol.

Ongoing Support

Continued follow-up, flare-up management, and access to a wider specialist network across London.

Fast London Appointments

Conveniently located across central and south London, often available within days.

Book An Appointment Today

Take Control of Your Digestive Health

Thousands of patients across London and the UK have trusted Dr. Arun Rajendran to get to the bottom of their digestive symptoms.

GMC Registered Consultant

All Major UK Insurers Accepted

Appointments Often Within Days

Schedule Your Consultation

What Our Patients Say

Patient Reviews & Testimonials

Excellent

Verified By :

Dr Arun saw me at the last Minute which was really kind of him. He explained everything about the procedure very clearly and precise.

Patient Name 4, London

It was an unsatisfactory visit because the Moviprep hadn’t worked properly, despite me not having eaten solid food for 36 hours. The consultant couldn’t see what he was doing in part of the bowel and has suggested that I should return in six months, making this colonoscopy extremely expensive.

Patient Name 3, UK

Dr Arun Rajendra’s is really a very doctor and understand each issue clearly and give you a solution for your overall health. Thanks so much for everything and very responsive and very much caring too towards his patient. Really lucky to have such good doctors

Patient Name 2, USA

I have seen Mr Rajendran 3 times over the last 6 months & he has been very professional and attentive throughout. I recently had an appointment & took my sister with me and he explained everthing to us & was very kind. I cannot fault him & would highly recommend.

+44 (0)20 3404 5254

Monday - Friday 09:00 - 17:00

+44 (0)20 3404 5254

Expert Diarrhoea Treatment That Restores Balance

10+

5*

Fast

Expert Diarrhoea Treatment That Restores Balance

10+

5*

Fast

Understanding Your Symptoms

About Diarrhoea

Causes & Risk Factors

Common Causes of Diarrhoea

Gut Infections

IBS

Inflammatory Bowel Disease

Food Intolerances

Medications

Stress & Anxiety

Recognising Your Symptoms

Symptoms of Diarrhoea

Seek urgent advice if you notice:

Restore Balance. Digest Well, Live Better.

Getting to the Root Cause

Diagnosis

Detailed Consultation

Blood Tests

Stool Analysis

Colonoscopy / Endoscopy

"Accurate diagnosis is the foundation of effective diarrhoea treatment."

Personalised Care

Diarrhoea Treatment - Your Options

Rehydration Therapy

Treating the Underlying Condition

Medications for Diarrhoea

Ongoing Support

Self-Care & Wellbeing

Diet & Lifestyle Tips

Dietary Tips

Hydration

Lifestyle

Your Care, Your Way

Why Choose Dr. Arun Rajendran?

Accurate Diagnosis First

Personalised Treatment

Ongoing Support

Fast London Appointments

Take Control of Your Digestive Health

What Our Patients Say

Patient Reviews & Testimonials

Excellent

Patient Name 4, London

Patient Name 3, UK

Patient Name 2, USA

Patient Name 1, London

+44 (0)20 3404 5254

The London Clinic

BMI The Clementine Churchill Hospital

OneWelbeck

OSD Healthcare

Clinic Opening Times