It's blue with cold. Watch out! The result is vasculitis.

"At that time, the weather was very cold, and my fingers were numb. I thought it was a bad blood circulation, so I took Chinese medicine and hot compress. I didn't expect to see a doctor before I felt numb. It turned out that it was not numbness, but severe finger necrosis. The doctor also said: "If I am diagnosed later, I may have to amputate my leg ..." The 25-year-old Xiaojun (pseudonym) still has a lingering fear.

The patient's fingers are white and purple, accompanied by embolism and necrosis-Raynaud syndrome. (Photo/provided by Dr. Wei) Wei, director of the Department of Allergy, Immunology and Rheumatology, Affiliated Hospital of Sun Yat-sen Medical University, said that many people would think that finger hemp has poor blood circulation. If it gets worse like Xiaojun, it may be vasculitis and long-term embolism and necrosis of finger peripheral blood vessels.

Vasculitis is caused by autoimmune diseases and attacks on blood vessels. Because blood vessels are all over the body, its symptoms can be said to be "ever-changing". If it invades the heart, brain and lungs, it may cause myocardial infarction, stroke and pulmonary embolism. If it is kidney, stomach and intestine, it may cause hematuria, proteinuria, abdominal pain or joint pain. One of the more common is purple spots on the skin. If you press your finger on the purple spot without fading, you should pay special attention.

Doctor Wei said vasculitis is divided into autoimmune diseases, such as lupus erythematosus and rheumatoid arthritis. Or secondary vasculitis caused by hepatitis C and hepatitis B; There are also primary vasculitis with unknown causes, which are relatively rare, but the severity is relatively high and difficult to detect. Therefore, if there are early symptoms such as cold hands and feet, numbness and purple, such as Raynaud's syndrome, winter may be more than just physical weakness. If ignored, vasculitis will invade organs, which may be more difficult to treat and even life-threatening.