This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.
Read about Behçet's disease, a rare and poorly understood condition in which blood vessels and tissues may become inflamed (swollen).
Content supplied by the NHS website, refreshed 20 August 2026. View the original NHS article ↗
Licensed under the Open Government Licence v3.0 ↗. MyPHU is independent and is not endorsed by the NHS.