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Learning to type with all fingers1/23/2024 ![]() In some cases, an underlying health condition could be causing the blood vessels to overreact. There’s some evidence that primary Raynaud’s may be an inherited condition, as cases have been known to run in families. Exactly what causes these disruptions is unclear. It seems that primary Raynaud’s is caused by disruptions in how the nervous system controls blood vessels. This means the condition occurs by itself, without being associated with another health condition. The most common form of Raynaud’s is primary Raynaud’s phenomenon. Strong emotions such as stress or anxiety may also trigger symptoms. Symptoms can be triggered by mildly cool weather, getting something out of the freezer, or running your hands under a cold tap. In people with Raynaud’s, the sensitive blood vessels overreact to cold temperatures and become narrower than usual, significantly restricting the blood flow. This is because the small blood vessels under the skin spasm, slowing down the blood supply that is helping to preserve your body’s core temperature. When your body is exposed to cold temperatures, the extremities, such as your fingers and toes, lose heat. In many cases, no cause is identified, although it’s sometimes linked to other health conditions. Raynaud’s phenomenon is the result of over-sensitive blood vessels in the body’s extremities. Raynaud’s is slightly more common in women than men. Secondary Raynaud’s can develop at any age, depending on the cause. Primary Raynaud’s usually begins in your 20s or 30s. There may be as many as 10 million people with the condition in the UK. It affects up to 20% of the adult population worldwide. Raynaud’s phenomenon is a common condition. ![]() Read more about the complications of Raynaud’s. Secondary Raynaud’s can severely restrict the blood supply, so it carries a higher risk of complications, such as ulcers, scarring and even tissue death (gangrene) in the most serious cases. Read more about what causes Raynaud’s and diagnosing Raynaud’s. Your GP can help to determine whether you have primary or secondary Raynaud’s by examining your symptoms and carrying out blood tests. However 1 in 10 people with primary Raynaud’s goes on to develop a condition associated with secondary Raynaud’s, such as lupus. The causes of primary Raynaud’s are unclear. Most cases of secondary Raynaud’s are associated with conditions that cause the immune system to attack healthy tissue (autoimmune conditions), such as scleroderma and lupus.
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