12980 Behcets Disease

Overview

Behçet's disease (also called Behçet's syndrome) is a rare, lifelong condition that causes inflammation in the blood vessels of the body. This inflammation can affect many different areas, leading to ulcers in the mouth and on the genitals, skin rashes, eye swelling, joint pain, and sometimes problems in the nervous system or digestive tract. It is not contagious, and with proper care most people can manage their symptoms well.

No, Behçet's disease is rare. It is more common in some parts of the world, such as Turkey, the Middle East, and East Asia, along the historic Silk Road. In the UK and most Western countries, it is considered uncommon or rare.

Behçet's disease usually begins in people in their 20s or 30s, though it can appear at any age. Men and women are affected, but in some regions men may experience more severe symptoms. It can occasionally affect children and older adults.

Symptoms

Common symptoms

• Recurrent, painful mouth ulcers that look like canker sores and often come back more than three times a year
• Genital ulcers — painful sores on the scrotum or vulva that may leave scars
• Skin problems such as red spots, pustules, or small, tender nodules that resemble acne
• Eye inflammation causing redness, eye pain, sensitivity to light, blurred vision, or floaters
• Joint pain and swelling, especially in the knees, wrists, or ankles
• Persistent tiredness or fatigue that doesn't improve with rest

Symptoms in children

• When Behçet's occurs in children, symptoms may be more subtle and harder to recognise.
• They often have mouth ulcers, but may also experience unexplained fever, joint pain, and stomach aches.
• Eye involvement in children can be serious and needs prompt attention.

Symptoms in older adults

• In older adults, Behçet's is rare and may appear over age 60.
• Symptoms can be mistaken for other age-related conditions, such as joint problems or vision changes.
• Frequent mouth ulcers, unexplained skin lesions, or new eye symptoms should be checked by a doctor.

Causes

Main causes

• The exact cause is not fully understood, but Behçet's is thought to be an autoimmune condition, where the immune system mistakenly attacks the body's own blood vessels.
• There may be a genetic link — some people carry certain genes (such as HLA-B51) that make them more likely to develop it.
• An environmental trigger, like an infection, may be involved in activating the condition in genetically predisposed people.

Risk factors

• A family history of Behçet's disease
• Ethnic background — it is more common in people of Turkish, Middle Eastern, East Asian, or Mediterranean descent
• Being between the ages of 20 and 40 when symptoms first appear
• Carrying the HLA-B51 gene variant, though most people with this gene never develop Behçet's

When to see a doctor

See a doctor urgently if:

• See a doctor the same day if you have new eye pain, redness, or vision changes.
• If you have a high fever or feel generally very unwell, seek urgent medical advice.
• If mouth or genital ulcers become severely painful, look infected, or stop you eating, drinking, or passing urine.
• If you develop sudden weakness, a severe headache, or difficulty speaking, call your local emergency number.

Book a routine appointment if:

• Make an appointment with your GP if you have had mouth ulcers at least three times in a year.
• If you notice recurrent genital ulcers or experience a combination of unexplained symptoms such as joint pain, skin rashes, and fatigue, talk to your doctor.
• Keep a symptom diary to help your doctor understand your pattern of symptoms.

Diagnosis

There is no single test for Behçet's disease. A doctor — usually with help from a specialist such as a rheumatologist — makes the diagnosis based on your symptoms, medical history, and physical examination. You may need to have had mouth ulcers at least three times in a year plus two other typical features like genital ulcers, eye inflammation, or specific skin changes.

Tests that may be done

• A full physical examination, including checking your mouth, skin, and genitals
• Blood tests to look for signs of inflammation and to rule out other conditions
• A pathergy test — a harmless, sterile needle prick to see if the skin forms a small red lump characteristic of Behçet's
• An eye examination by an ophthalmologist to check for any silent inflammation
• Sometimes a biopsy (a tiny sample of a lesion) to rule out other causes

What to expect at your appointment

Getting a diagnosis can take time, sometimes months or years, because symptoms overlap with other conditions. Try to be patient and keep a careful record of your symptoms and how often they occur. Once diagnosed, you will likely be referred to a team of specialists who are experienced in managing Behçet's.

Treatment

Treatment for Behçet's disease is aimed at reducing inflammation, easing symptoms, and preventing damage to organs. Because the condition affects people very differently, your treatment plan will be tailored to you. You may see a rheumatologist, dermatologist, eye doctor, and other specialists as part of a coordinated team.

Self-care at home

• Use a soft toothbrush and an alcohol-free mouthwash to keep ulcers from getting worse.
• Rinse your mouth with warm salt water several times a day to soothe mouth sores.
• Protect genital sores with a barrier cream or lubricating jelly — ask your pharmacist for options.
• Take warm baths with a little salt or oatmeal to help skin lesions.
• Rest when you feel fatigued, and try gentle pacing of daily activities.
• Wear sunglasses and a hat to protect your eyes from bright light.

Medical treatments

Doctors use a range of medicines to manage Behçet's. For mild mouth or skin ulcers, topical treatments such as gels, creams, or mouthwashes can help. For more active disease, anti-inflammatory medicines (including corticosteroids) may be given for short periods to quickly control symptoms. Longer-term treatments often include medications that suppress or regulate the immune system to prevent relapses. More targeted biologic therapies may be offered for severe or difficult-to-treat cases. The right choice depends on your symptoms, their severity, and how you respond to treatment. Your specialist will monitor you regularly to adjust the plan as needed.

When is surgery considered?

Surgery is not a standard treatment for Behçet's disease. It may be considered in rare cases where complications affect major blood vessels (such as aneurysms), the digestive tract (perforations or uncontrollable bleeding), or the central nervous system.

Living with this condition

Living with Behçet's means learning to manage a condition that can be unpredictable. Many people find that stress, poor sleep, or missing medicines can trigger a flare-up. Try to plan ahead for good days and bad days. Keep a symptoms diary, stay in touch with your care team, and attend regular check-ups to stay on top of any changes.

Lifestyle tips

• If you smoke, consider quitting — smoking can make symptoms worse.
• Find gentle ways to stay active, like walking, swimming, or stretching.
• Build time for rest and relaxation, and try mindfulness or breathing exercises to reduce stress.
• Maintain a good sleep routine — fatigue is common and rest matters.
• Learn to notice your personal warning signs of a flare-up so you can act early.

Diet and exercise

There is no special diet that cures Behçet's, but eating a balanced Mediterranean-style diet supports your overall health and immune system. During painful mouth ulcers, choose soft, bland foods like soup, yogurt, mashed potatoes, and porridge, and avoid spicy, salty, or very hard foods. Moderate, regular exercise such as walking or swimming can help joint stiffness and boost your mood — listen to your body and adapt when you need to.

Mental health and emotional wellbeing

Living with a chronic and unpredictable condition can be frustrating and worrying. It is completely normal to feel anxious, low, or overwhelmed at times. Talk to your GP or your specialist team about how you're feeling — they can point you to counselling or peer support. You don't have to manage alone. And if you ever feel in crisis or need urgent emotional support, please reach out to a mental health crisis line or go to your nearest emergency department.

Prevention

Behçet's disease cannot be prevented because its exact cause isn't known. However, you can reduce the impact of flare-ups by sticking to your treatment plan, managing stress, avoiding known triggers, and seeing your specialists regularly.

Vaccines

There is no vaccine that prevents Behçet's. It is still important to keep routine vaccines (such as flu, COVID-19, and other recommended immunisations) up to date. Because some treatments for Behçet's affect the immune system, talk to your doctor before getting any live vaccines (like some travel vaccines). They'll advise what is safe for you.

Screening programmes

There is no routine screening test for Behçet's in the general population. Once you're diagnosed, your care team will set up regular check-ups — especially with an eye specialist — to detect any eye inflammation early, even before you have symptoms. Blood tests and scans may also be used to monitor your organs.

Complications

If left untreated

• Untreated eye inflammation can lead to permanent vision loss.
• Inflammation in the brain or nervous system may cause strokes, seizures, or balance problems.
• Damage to the digestive tract can cause severe pain, bleeding, or a perforation (a hole) in the bowel.
• Blood vessel inflammation can lead to blood clots or bulges (aneurysms) in major arteries.
• Long-standing inflammation may cause severe joint damage.

Long-term outlook

With early diagnosis and modern therapies, most people with Behçet's live full and active lives. The disease often becomes less active over time, and many people experience long periods without symptoms. While there is no cure, the goal is to keep inflammation under control and protect your organs. Between flare-ups, many people enjoy a good quality of life — ongoing care and support make a real difference.

Find support

International organisations

• Behçet's Syndrome Society ↗

Local organisations

• Behçet's Syndrome Society (support groups and UK advice) ↗ · United Kingdom

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