Health encyclopaedia 健康百科全书

Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单

Causes of Varicose veins原因静脉曲张

Blood returning to the heart flows upwards from the legs.回流的血液向心脏流动向上从腿部。 It is moving against gravity so the veins in the legs have to work hard to pump a heavy amount of blood.这是对移动的严重性，因此，静脉在腿部有努力工作，泵一个沉重的金额血液。 The flow is helped by a series of one-way valves in the veins that only allow the blood to move upwards (against gravity).流动是帮助了一系列的一条单向阀，在静脉，只有让血液动议向上（对重力） 。 This reduces the pressure of blood below by supporting it at different stages on its way up.这将减少的压力，血液在下面支持它的不同阶段，就其方式。

If the vein valves are leaky, the weight of the blood going from the heart to the lower legs presses on the walls of the veins.如果静脉阀门漏水，重量，血液从心脏到小腿压力机上的墙壁上静脉。 The blood cannot drain properly and so flows back down again causing the veins to bulge and stretch.血液不能流失，妥善，所以流动回再次造成静脉，以胀和伸展。 Veins near the surface of the leg aren’t supported by muscles, so there is nothing to stop them getting bigger with the increased pressure of blood.静脉附近的表面腿部arenâ € ™吨的支持，肌肉，所以没有阻止他们愈来愈大，与增加的压力，血压。 This pressures causes the surface veins to stretch, bulge and become winding in shape (tortuous).这个压力的原因，表面上静脉伸展，胀，并成为清盘的形状（曲折） 。 It is only usually the surface veins that are affected because the deep veins are well supported by surrounding tissue.这只是通常表面静脉表示，受影响的，因为深静脉良好的支持，周围组织。

Varicose veins tend to run in families, and there is probably a genetic tendency to leaky valves.静脉曲张往往运行在家庭，有可能是遗传的倾向，漏水的阀门。 Being overweight increases the risk of varicose veins, as does tight clothing and standing up for long periods of time, for example as part of your job.超重增加的风险，静脉曲张，作为是否紧张，服装和站起来为很长一段时间，例如作为的一部分，您的工作。

Pregnant women can get varicose veins because of the pressure on the veins in the pelvis as the womb (uterus) expands.孕妇可以得到静脉曲张，因为压力，静脉在骨盆腔作为子宫（子宫）扩大。 Women who have had children are more likely to have varicose veins.妇女谁曾儿童更可能有静脉曲张。 For women, the veins can also get worse before and during your period because of the increased pressure in your abdomen.为妇女，静脉，还可以更坏之前和期间，您的时期，因为增加的压力，在您的腹部。

People with conditions that affect the blood flow, such as diabetes, are more prone to varicose veins, as are people with a previous vein disease such as thrombophlebitis.人与条件，影响血流量，如糖尿病，较易静脉曲张，是人与先前的静脉疾病，如血栓。

• Vaginismus 阴道痉挛 Varicose veins 静脉曲张 Vasectomy 输精管结扎术 Vertigo 眩晕 Visual impairment 视觉受损 Vitiligo 白癜风

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