17890 Mesenteric Lymphadenitis

Overview

Mesenteric lymphadenitis is swelling and inflammation of the lymph nodes in the membrane that attaches your intestines to the inside of your abdominal wall. It often feels like stomach pain and can be mistaken for appendicitis, but it is usually not serious and often gets better on its own.

It is a relatively common cause of abdominal pain in children and young adults, though exact numbers are not known.

It can affect anyone, but it is most common in children and teenagers, and in people with a recent cold, sore throat, or stomach bug.

Symptoms

Common symptoms

• Pain in the lower right side of the abdomen
• Tenderness when pressing on the belly
• Fever
• Nausea
• Diarrhea or vomiting sometimes
• Feeling generally unwell

Symptoms in children

• Children may also have a runny nose, cough, or sore throat before the stomach pain appears.
• Children may feel more tired and clingy.
• Pain may be worse when moving or coughing.

Symptoms in older adults

• In older adults, the pain may be less localised and more generalised.
• Fever and abdominal pain may be accompanied by changes in bowel habits, but it is less common in this age group.

Causes

Main causes

• Viral infections – such as a cold, flu, or gastroenteritis
• Bacterial infections – such as strep throat or a respiratory infection
• Sometimes it follows a recent infection even after the initial symptoms go away
• In rare cases, inflammatory bowel disease can cause it.

Risk factors

• Age – children and teenagers are more likely
• Recent upper respiratory or intestinal infection
• Frequent contact with other children (e.g., school or daycare)
• Weakened immune system

When to see a doctor

See a doctor urgently if:

• If you or your child have severe abdominal pain, a hard or swollen belly, high fever, or repeated vomiting, seek medical care immediately.
• If the pain gets steadily worse over several hours.

Book a routine appointment if:

• If you have mild abdominal pain that lasts more than a few days, or if you have a fever and are concerned, make an appointment with your GP or family doctor.
• If you are not sure whether your child’s pain is serious, trust your instincts and contact a healthcare professional.

Diagnosis

A doctor will ask about your symptoms and examine your abdomen. The diagnosis is often made after ruling out other more serious causes of abdominal pain, such as appendicitis.

Tests that may be done

• Blood tests to check for signs of infection
• Urine test to rule out a urinary tract infection
• Ultrasound scan of the abdomen – this is the most helpful imaging test and can show enlarged lymph nodes
• CT scan in some cases if the diagnosis is unclear

What to expect at your appointment

The doctor may press on your belly and ask you to describe the pain. You may need to give a urine sample or have blood drawn. You may also be sent for an ultrasound. It may take a few hours or days to get the diagnosis, but most people do not need urgent treatment.

Treatment

Treatment focuses on managing symptoms and supporting your body while the infection clears. Most people recover at home without any specific medicine.

Self-care at home

• Get plenty of rest
• Drink lots of clear fluids, such as water, to stay hydrated
• Eat soft, bland food if you are hungry, and avoid heavy or greasy meals
• Use a warm compress or hot water bottle on your tummy gently, if it helps
• Take over-the-counter pain relief only after checking with a pharmacist or doctor – do not give aspirin to children

Medical treatments

If a bacterial infection is confirmed or strongly suspected, a doctor may prescribe antibiotics. Pain relief may be recommended, but the exact medicine depends on your age, health, and other factors. Always follow the advice of your healthcare provider and never take medicines meant for someone else.

When is surgery considered?

Surgery is almost never needed for mesenteric lymphadenitis itself. In rare cases, if the pain is very severe and the diagnosis is uncertain, a surgeon may operate to rule out appendicitis – but once the lymph nodes are found to be the cause, no further surgery is needed.

Living with this condition

While symptoms are present, take it easy and let your body heal. You may need a few days off work or school. Once the pain and fever settle, you can gradually return to normal activities.

Lifestyle tips

• Keep your hands clean to avoid spreading infection
• Encourage children to wash hands after using the toilet and before eating
• Stay up to date with routine immunisations
• Avoid smoking and second-hand smoke, as this can make respiratory infections worse

Diet and exercise

Eat small, light meals if you feel like eating, and drink plenty of fluids. Once the infection has cleared, return to your usual diet and gradually resume exercise, listening to your body.

Mental health and emotional wellbeing

Abdominal pain can be worrying, and having a painful illness may affect your mood and sleep. It is normal to feel a bit anxious or low while you recover. Talk to friends or family about how you feel, and if you notice persistent low mood, speak to your GP.

Prevention

You cannot always prevent mesenteric lymphadenitis, because it often follows common infections. But practising good hand hygiene and avoiding close contact with people who are sick may reduce the risk.

Vaccines

Stay up to date with routine vaccinations, such as the flu vaccine and other recommended immunisations, to reduce the risk of infections that can trigger the condition.

Screening programmes

No screening test is available for this condition.

Complications

If left untreated

• Abscess (a pocket of pus) may form near the lymph nodes
• Spread of infection to the abdominal cavity (peritonitis) in very rare cases
• Prolonged pain and vomiting leading to dehydration

Long-term outlook

With rest and fluids, most people recover fully within one to two weeks. In rare cases, symptoms may last a bit longer, but serious complications are uncommon. Your doctor will let you know if any follow-up is needed.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.