Por qué es un doctor de primer nivel/Professional statement/Perché è un dottore di prim’ordine

Dr Aathavan Loganayagam trained in medicine at Guy’s, King's and St. Thomas’ medical schools. He then underwent rigorous structured specialty training in gastroenterology and general internal medicine in the well respected South London training programme.

He then spent two years during postgraduate training as a research and endoscopy fellow at Guy’s and St Thomas’ Hospitals, London. His research was in the fields of pharmacogenetics, inflammatory bowel disease and gastrointestinal malignancy. He has received awards and grants for outstanding research work, including the prestigious NHS Innovation London Award.

Dr Loganayagam has numerous publications in peer reviewed journals on all aspects of gastroenterology. He is actively involved in clinical research. He has particular local expertise in the practice of personalised medicine and the utilisation of novel therapeutic agents in the treatment of complex inflammatory bowel disease. He is currently the lead clinician for endoscopy at Queen Elizabeth Hospital, Woolwich.

Diagnostic and advanced therapeutic endoscopy remains a major part of his clinical expertise, including assessment and treatment of inflammatory bowel disease, strictures, polyps and cancers.

Dr Loganayagam is an approachable doctor who takes pride in his communication skills with patients. He is keen to ensure that patients are fully informed and involved in all aspects of their care.

Especialista en

Bowel cancer

What is it? Bowel cancer, also known as colorectal cancer, originates from the development of tumour cells in the mucosa of the bowel. Given th...


Index:  &...

Indigestion (dyspepsia)

Index: What is indigestion? ...

Inflammatory bowel disease (IBD)

What is inflammatory bowel disease (IBD)? Inflammatory bowel disease (IBD) a medical term used to describe a group of diseases that cause &...

Irritable bowel syndrome (IBS)

What is irritable bowel syndrome? Irritable bowel syndrome (IBS) is a functional disorder of the large intestine....


Index What is a colonoscopy? &a...

Enfermedades, Pruebas y Tratamientos

  • Abdominal pain
  • Abdominal ultrasound
  • Achalasia
  • Acid reflux
  • Alcoholic liver disease
  • Alcoholism
  • Anal fissure
  • Ascites
  • Autoimmune hepatitis
  • Barrett's oesophagus
  • Biopsy
  • Bloated stomach
  • Blood in stool (rectal bleeding)
  • Bowel cancer
  • Bowel cancer screening
  • Bowel incontinence
  • Capsule endoscopy
  • Cholelithiasis (gallstones)
  • Chronic diarrhoea
  • Cirrhosis
  • Coeliac disease
  • Colic
  • Colitis
  • Colon cancer
  • Colonoscopy
  • Colorectal cancer
  • Constipation
  • Crohn's disease
  • Diabetes
  • Diarrhoea
  • Digestive diseases
  • Diverticular disease
  • Diverticulitis
  • Drug induced liver injury
  • Dysmotility
  • Dysphagia
  • Eating disorders
  • Endoscopic mucosal resection (EMR)
  • Endoscopy
  • Fatty liver
  • FibroScan
  • Food intolerance
  • Food intolerance test
  • Gastric balloon
  • Gastric band
  • Gastric bypass
  • Gastrointestinal bleeding
  • Gastrointestinal endoscopy
  • Gastroscopy
  • Halitosis
  • Helicobacter pylori
  • Hepatic encephalopathy
  • Hepatorenal syndrome
  • Hiatal hernia
  • Indigestion (dyspepsia)
  • Inflammatory bowel disease (IBD)
  • Iron deficiency
  • Irritable bowel syndrome (IBS)
  • Lactose intolerance
  • Lactose intolerance test
  • Liver
  • Liver biopsy
  • Liver cancer
  • Liver cyst
  • Liver disease
  • Liver function tests
  • Malnutrition
  • Morbid obesity
  • Nutrition
  • Obesity
  • Oesophageal manometry
  • Oesophageal varices
  • Oesophagitis
  • Pancreatic cancer
  • Pancreatitis
  • pH monitoring
  • Piles (haemorrhoids)
  • Polypectomy
  • Polyps
  • POSE procedure
  • Primary biliary cholangitis (PBC)
  • Primary sclerosing cholangitis (PSC)
  • Rectal cancer
  • Rectosigmoidoscopy
  • Short bowel syndrome
  • SIBO
  • Stomach cancer
  • Stomach flu
  • Stomach reduction
  • Stomach ulcer
  • Ulcerative colitis
  • Ultrasound
  • Viral hepatitis
  • Virtual colonoscopy
  • Vitamin D deficiency
  • Vomiting

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Es un servicio de mensajería privada y videoconferencia que te permite realizar una consulta médica conmigo en cualquier momento y lugar./A private messaging and video conference service that allows you to contact the best doctors at any time and place./È un servizio di messaggistica privata e videoconferenza che ti permette di contattare i migliori medici in ogni momento e in qualsiasi luogo.



What is giardiasis, and how does one get it?
Have you been suffering from bloating, diarrhoea, and abdominal cramps recently? If so, you may have contracted a condition known as giardiasis. Here to outline the condition's symptoms, and to explain how it is diagnosed and treated, is highly experienced and proficient consultant gastroenterologist, Dr Aathavan Loganayagam.
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Can stress cause constipation?
Stress can certainly have an extremely negative effect on our daily lives, and can not only affect us mentally, but also physically and emotionally. In our latest article, highly esteemed London-based gastroenterologist, Mr Aathavan Loganayagam, reveals how being stressed can lead to uncomfortable and life-disrupting bowel-related conditions such as constipation.
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Probiotics and IBS: Should you trust your gut?
It's believed that between one and two in 10 people in the UK have IBS. Many may use probiotics to reduce the everyday, yet ever annoying, symptoms of this condition. However, just how effective are they? Dr Aathavan Loganayagam, top gastroenterologist, explores this question with detailed expertise. Read on to find out more.
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Bile acid malabsorption: symptoms and treatment
If there is an excess build-up of bile acids in your colon, it can lead to a condition known as bile acid malabsorption, which unfortunately can cause bloating and gas. Sounds like symptoms of irritable bowel syndrome? We asked consultant gastroenterologist Dr Aathavan Loganayagam how the conditions compare and how BAM is treated.
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5 possible reasons for unexplained weight loss
Normally, we are most concerned with weight gain as opposed to worrying about weight loss. But just when does losing weight become too much and what does it mean especially if it's unintentional? We spoke to one of our expert gastroenterologists Dr Aathavan Loganayagam about the possible illnesses that can lead to unexplained weight loss.
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Digestive enzyme supplements: do they really work?
Perhaps you've been doing some research into supplements that can help alleviate symptoms of bloating and constipation related to gastrointestinal conditions such as irritable bowel syndrome. We asked one of highly-experienced London gastroenterologists Dr Aathavan Loganayagam for his expert opinion as to whether any of the digestive enzyme supplements out there on the market really do work or not.
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Constipation: causes and when to seek help
It can certainly be unpleasant and even painful to live with chronic constipation especially if you have frequent excessive straining. But just when does constipation become severe enough to require a trip to see a specialist? One of London's top gastroenterologists Dr Aathavan Loganayagam explains more.
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How to treat post-infectious irritable bowel syndrome
Post-infectious irritable bowel syndrome may appear suddenly as a bout of infection in the stomach and intestines, often as the result of bacteria such as Salmonella that causes food poisoning. Here, one of London's top gastroenterologists Dr Aathavan Loganayagam explains everything you need to know about the condition, including how long it lasts and how it can be treated.
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How to treat travellers’ diarrhoea or IBS
If you live with irritable bowel syndrome the antibiotic Rifaximin can be taken to manage symptoms such as flatulence and bloating. The drug can also be used to treat travellers' diarrhoea meaning you don't need to fear travelling to exotic locations. Here, expert gastroenterologist Dr Aathavan Loganayagam explains how the drug works.
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What is microscopic colitis?
Do you regularly suffer from stomach cramps and watery diarrhoea? It could be a case of microscopic colitis, which causes inflammation of the large bowel or colon. One of our top gastroenterologists Dr Aathavan Loganayagam explains everything you need to know about the condition; from the causes to the treatment options.
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Liver disease: what happens during a FibroScan?
Liver disease a serious problem in the UK. A FibroScan is a test that can accurately diagnose the amount of scarring on the liver, which is very important for determining the stage of the disease and predicting treatment responses. Here, top gastroenterologist Dr Aathavan Loganayagam explains how the test works.
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How much farting is normal?
As embarrassing as it is - we all fart! Whether it's silent, stinky or odourless, it's the normal process of your body digesting food. Read more from our expert gastroenterologist Dr Aathavan Loganayagam on just how much farting is too much every day.
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Who really needs to eat gluten-free?
It seems that gluten has developed a bad reputation these days, with many of us opting for gluten-free alternatives and cutting out a key part of our diet altogether. But does everyone really need to eat this way? Top gastroenterologist Dr Aathavan Loganayagam is here to explain the symptoms of the medical conditions that may require some people to eat a gluten-free diet.
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What happens if Helicobacter pylori goes untreated?
Helicobacter pylori are strange bacteria that live in the stomach that can lead to gastritis and inflammation. Most people do not realise that they have the condition, which can go on for years. We've asked consultant gastroenterologist Dr Aathavan Loganayagam to explain what happens if the condition is left undiagnosed and whether it can be treated.
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8 ways to help prevent bowel cancer
The UK has one of the highest rates of bowel cancer in Europe, however, the disease is one of the most preventable cancers. Leading London gastroenterologist Dr Aathavan Loganayagam shares his top tips on what you can do to reduce your chances of developing the disease.
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FODMAP diet: how it helps IBS
Bloated? Stomach cramps after you've eaten? It may be time to try the low FODMAP diet, a temporary eating plan that helps improve digestive symptoms. Read more from our expert gastroenterologist Dr Aathavan Loganayagam on the dietary treatment and how it works.
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Oesophageal cancer: what is it and can it be treated?
Oesophageal cancer is a rare type of cancer that grows in your oesophagus (the 'food pipe', or tube) that leads from the throat to the stomach. The earlier oesophageal cancer is diagnosed and treated, the better the outcome. So, how is this difficult and challenging type of cancer dealt with? Dr Aathavan Loganayagam, a leading gastroenterologist, presents a concise guide about oesophageal cancer.
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Irritable bowel syndrome (IBS) and your gut bacteria
Within our digestive tract, we all have a complex community of gut bacteria or gut flora. This mix of bacteria lines the length of your gut and are said to affect your metabolism, your immune system, and even your mood. Dr Aathavan Loganayagam, a leading gastroenterologist, discusses the recent findings that link your gut flora with irritable bowel syndrome (IBS).
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Colon cancer: 5 key symptoms to know
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What is stomach flu?
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Abdominal pain: when to see a doctor
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Heartburn and acid reflux: when to see a doctor
For some people, the symptoms of heartburn can be unbearable and in some instances, there may be confusion over whether they are suffering from heartburn or a heart attack. In either case, seeking help from a doctor is necessary. Top gastroenterologist Dr Aathavan Loganayagam explains discusses heartburn and acid reflux...
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Is blood in my poo normal?
A small amount of one-off bleeding from the bottom isn't usually a serious problem but it's very important to seek medical attention if the bleeding becomes very heavy. Dr Aathavan Loganayagam discusses what different colours of blood in the stool can mean and when to seek help.
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Why do I feel so tired?
One of the most common symptoms of iron deficiency is feeling exhausted and fatigued. Expert gastroenterologist Dr Loganayagam discusses iron deficiency and how to incorporate more of the mineral into the body through treatment and diet.
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How to prevent liver disease
The liver is essential for digesting food and removing toxic substances from the body to prevent liver diseases such as hepatitis A, B, C and cirrhosis. Consultant gastroenterologist Dr Aathavan Loganayagam advises on a healthy lifestyle to prevent liver disease.
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