便血是一种在平时生活中发病率比较频繁的疾病，相信很多朋友都曾经出现过便血的情况，那么便血的患者都会有着同样的疑问，为什么会便血呢，到底是什么原因引起的呢，我们又该怎么预防呢，下面我就给大家介绍一下大便出血的病因以及预防方法：
\n一：便血的几种病因
\n1、痔疮，这是最常见的一种便血病因。如果患有痔疮，在大便的时候一般没有疼痛感，血出现在大便中或者大便后，而且血不和粪便相互混合，出血量大小不一。
\n2、肛裂。肛裂的时候也会便血，一般血液呈鲜红色，手纸擦拭时带血或者呈点滴状滴下来，肛门伴随着疼痛感。
\n3、消化道问题。消化道出现问题也会便血，表现为黑红色或是柏油状，一般上消化道出血最常见，而如果下消化道出血一般血色较红。
\n4、直肠、结肠息肉。这种病因导致的便血一般没有疼痛感，呈鲜红色，血与大便分离。
\n5、直肠癌。这种疾病导致的便血一般呈现滴状，颜色鲜红而附着在大便的表层。直肠癌晚期患者的大便次数会增多，腹泻和便秘次数增加，便血更常见。
\n二：预防要点
\n1、预防肛门感染。痔疮是便血的最常见病因，而很容易受到大便影响而发炎，因此一定要做好预防肛门感染工作。对于痔疮出血患者，可以使用1：5000的高锰酸钾溶液对进行浸泡肛门，或者痔疮膏挤入肛门进行消炎、止血。
\n2、加强肛门锻炼：平时注意加强肛门的锻炼，这样可以促进肛门处的血液循环，具体的做法就是提肛运动。
\n3、每天定时排便。保持大便的通畅，及时排便。痔疮出血很多都是大便没有及时的排出而使腹压增加引起了出血症状，或者是大便干燥，排便力度大导致痔静脉破裂而出血。因此一定要保持大便的通畅，少吃大肉，多吃蔬菜，多喝开水。便秘患者可以吃蜂蜜或者香蕉，这有助于润肠通便。
\n4、饮食营养：如果患者出现一段时间的腹泻，就要注意保持均衡营养。饮食中如果含有低脂肪、少纤维的食物，虽然可以促进肠道的蠕动，但是不利于消化，因此要限制食用。
\n5、适当补充蛋白质和维生素。饮食中应选择低脂肪、高蛋白食物，像鱼肉、牛奶、豆制品等，同时注意及时补充维生素，多吃些瓜果蔬菜。饮食上要以半流食为主，每天坚持少量多餐，这样会对便血有很好的改善作用。
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生活中有很多的人会出现肛裂这种疾病，严重的影响到了患者的身心健康，给患者的生活造成了很多的麻烦和不便，大家应该对这种疾病引起重视，平时也要注意生活中的一些调理方法，合理的饮食，那么，肛裂出血怎么回事呢、怎么预防呢。
\n1、注意合理调配饮食：食不可过精，要粗细粮搭配，蔬菜等富含纤维的食物尽量多摄入，可使大便保持正常。要少喝酒，不吃辛辣刺激食物。
\n2、养成每天定时排便的习惯：保持大便通畅，要发现大便燥结时，切忌努责排便，积极防治便秘。
\n3、及时治疗肛隐窝炎症：以防止感染后形成溃疡和皮下瘘。及时治疗引起肛裂的各种疾病，如溃疡性结肠炎等病症，防止肛裂发生。
\n4、凡有肛周湿疹、皮炎、瘙痒等病要积极治疗：防止肛周皮肤硬化，弹性减弱而撕裂肛管皮肤。对有肛管皮肤损伤者，应积极治疗，防止因感染而形成溃疡。对患有肛隐窝炎和肛乳头炎者，要尽早治愈，防止诱发肛裂。
\n5、做肛门直肠指诊时，忌粗暴用力，以免损伤肛管：用肛门窥器作检查时，切忌使用窥器粗暴操作，损伤肛管。
\n肛裂的症状
\n1.肛门瘙痒：由于裂口溃疡面或皮下瘘管的分泌物，或肛门腺体流出的分泌物，刺激肛缘皮肤引起肛门湿疹和肛门搔痒。自觉肛门常潮湿不爽，并可使皮肤伴有表浅裂口或皮损。
\n2.全身症状：剧烈的疼痛可加重患者精神负担，并影响休息，引起神经衰弱。有的病人会因恐惧排便，有意减少进食量，久而久之，可引起轻度贫血和营养不良。妇女可出现月经不调，腰、骶部疼痛。肛裂感染期可有发热、肿痛和流脓血等。
\n3.疼痛：疼痛是初期肛裂的症状，其主要表现为疼痛剧烈，持续性剧疼，可持续加剧，数小时后可自动缓解。排便时出现此疼痛症状，其他如下蹲、坐行。
\n4.出血：排粪时，损伤创面，可致裂口出血。一般出血不多，粪便上染有血丝，或便后鲜血点滴，手纸带血。
\n5.便秘：多因患者恐惧排便时的剧痛，有意推迟排便时间和次数，使粪便在直肠内停留时间延长，水分被完全吸收，大便变得干硬，而此时排便，则会使裂口创伤加重，裂口加深，疼痛加重。如此往复，形成恶性循环。为此许多患者服用缓泻剂，致肛管缺乏正常粪便的扩张，肛管狭窄，并形成药物依赖性顽固性便秘。
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男，60岁，2016年经当地医院诊断，腹主动脉瘤，前壁后壁均有斑块，前壁斑块5.4×2.7厘米，后壁5.2×1.4厘米，并伴有心梗，脑梗，高血压，糖尿病。请给予治疗建议
","barId":"1675","topicTypeId":null,"topicThemeId":"1020","readLevel":0,"files":"","clickNoLikeCount":0,"clickLikeCount":0,"clickCount":0,"score":0,"partCount":0,"replayCount":0,"publishStatus":0,"publishTime":0,"isCream":null,"canReply":0,"shareUrl":null,"foodCouponVal":0,"emailNotice":0,"permission":0,"zlyShare":0,"status":0,"sort":0,"highlight":0,"highlightEffectTime":0,"digest":0,"digestEffectTime":0,"top":0,"topEffectTime":0,"closed":0,"stamp":0,"icon":0,"bgcolor":null,"fontcolor":null,"favtimes":0,"isAdopt":0,"adoptId":null,"sortDate":0,"metaSearch":null,"rn":2},{"id":"2046","isDel":0,"createAt":0,"createBy":null,"createName":null,"updateAt":0,"updateBy":null,"updateName":null,"userId":null,"title":"升主动脉瘤62mm能做手术吗？风险大吗","content":"男61岁一月前发现前胸闷后背疼痛 气喘咳嗽 在十堰市太和医院做胸部ct 彩超 心电图 医生确诊升主动脉瘤62mm
\n请问这个能做手术吗？风险大吗
","barId":"1675","topicTypeId":null,"topicThemeId":"1019","readLevel":0,"files":"","clickNoLikeCount":0,"clickLikeCount":0,"clickCount":0,"score":0,"partCount":0,"replayCount":0,"publishStatus":0,"publishTime":0,"isCream":null,"canReply":0,"shareUrl":null,"foodCouponVal":0,"emailNotice":0,"permission":0,"zlyShare":0,"status":0,"sort":0,"highlight":0,"highlightEffectTime":0,"digest":0,"digestEffectTime":0,"top":0,"topEffectTime":0,"closed":0,"stamp":0,"icon":0,"bgcolor":null,"fontcolor":null,"favtimes":0,"isAdopt":0,"adoptId":null,"sortDate":0,"metaSearch":null,"rn":2},{"id":"2520","isDel":0,"createAt":0,"createBy":null,"createName":null,"updateAt":0,"updateBy":null,"updateName":null,"userId":null,"title":"阑尾炎的症状有什么呢","content":"阑尾炎这样的疾病发生之后会导致患者有严重的腹痛，这样的疾病发生之后给我们患者带来太多的影响，我们只有及早做好治疗才能够减少一些危害发生，下面我们就来了解一下阑尾炎疾病的症状表现有什么。
\n1.急性阑尾炎
\n(1)腹痛典型的急性阑尾炎初期有中上腹或脐周疼痛，数小时后腹痛转移并固定于右下腹。当炎症波及浆膜层和壁腹膜时，疼痛即固定于右下腹，原中上腹或脐周痛即减轻或消失。因此，无典型的转移性右下腹疼痛史并不能除外急性阑尾炎。
\n单纯性阑尾炎常呈阵发性或持续性胀痛和钝痛，持续性剧痛往往提示为化脓性或坏疽性阑尾炎。持续剧痛波及中下腹或两侧下腹，常为阑尾坏疽穿孔的征象。
\n(2)胃肠道症状单纯性阑尾炎的胃肠道症状并不突出。在早期可能由于反射性胃痉挛而有恶心、呕吐。盆腔位阑尾炎或阑尾坏疽穿孔可有排便次数增多。
\n(3)发热一般只有低热，无寒战，化脓性阑尾炎一般亦不超过38℃。高热多见于阑尾坏疽、穿孔或已并发腹膜炎。
\n(4)压痛和反跳痛腹部压痛是壁腹膜受炎症刺激的表现。阑尾压痛点通常位于麦氏点，即右髂前上棘与脐连线的中、外1/3交界处。反跳痛也称Blumberg征。在肥胖或盲肠后位阑尾炎的患者，压痛可能较轻，但有明显的反跳痛。
\n(5)腹肌紧张阑尾化脓即有此体征，坏疽穿孔并发腹膜炎时腹肌紧张尤为显著。但老年或肥胖患者腹肌较弱，须同时检查对侧腹肌进行对比。
\n(6)皮肤感觉过敏在早期，尤其在阑尾腔有梗阻时，可出现右下腹皮肤感觉过敏现象，范围相当于第10～12胸髓节段神经支配区，位于右髂嵴最高点、右耻骨嵴及脐构成的三角区，也称Sherren三角，它并不因阑尾位置不同而改变，如阑尾坏疽穿孔则在此三角区的皮肤感觉过敏现象即消失。
\n2.慢性阑尾炎
\n(1)腹痛右下腹部疼痛，其特点是间断性隐痛或胀痛，时重时轻，部位比较固定。多数患者在饱餐，运动，劳累，受凉和长期站立后，诱发腹痛发生。
\n(2)胃肠道反应患者常有轻重不等的消化不良、食欲下降。病程较长者可出现消瘦、体重下降。一般无恶心和呕吐，也无腹胀，但老年患者可伴有便秘。
\n(3)腹部压痛压痛是惟一的体征，主要位于右下腹部，一般范围较小，位置恒定，重压时才能出现。无肌紧张和反跳痛，一般无腹部包块。
\n(4)体征各种特定的压痛点如麦氏点、兰氏点及腰大肌征、罗氏征阳性。
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在日常生活中一旦发现有便血的情况，一定要及时的看医生，因为早期的检查和治疗能够使病情得到有效的控制，并且也会缩短治疗的时间，如果忽视治疗的话就很有可能对身体埋下隐患，以至于影响治疗的效果，接下来就随我们一起来看看，便血是什么原因所引起的!
\n症状起因。
\n便血原因：引起便血的原因是多方面的，可以说凡是消化道的疾病都可以引起便血。便血分可见和不可见，不可见的便血一般称之为潜血阳性，可见的是人的肉眼能看见的，包括血的颜色和量、与大便是否相混合等。从便血的颜色和量又可以分出是上消化道出血或下消化道出血。上消化道包括食道、胃、十二指肠、胆道、胰腺等;下消化道是大肠和小肠。
\n上消化道出血，一般颜色比较深，发黑，并与大便相混，医学上称为柏油便。上消化道一般常见的出血部位有：食道静脉曲张出血，胃及十二指肠溃疡出血、食道癌、贲门癌、胃癌、癌(腺)体破坏出血、胆道出血等。血量有多有少。便血的特点是颜色发黑，因为红血球被消化液所破坏，如胃液、十二指肠液、胆汁、胰液等液体破坏、分解，变成了非血球的有机物质。它们再与被消化的食物相混，进入小肠及结肠被消化吸收。血与食物残渣相混成为大便，排出体外，这样的大使就成为黑色的了。
\n下消化道出血分为良性疾病出血和肿瘤性疾病引起的出血。它们引起的便血，从颜色和量上也不-样。肿瘤引起的便血，从颜色上看不是鲜红色，而是像果酱色，颜色较暗。这是因为瘤体组织较脆，易烂，易脱落。在食物残渣及大便通过时的阻力作用下，引起瘤体组织坏死、脱落，或与之相混，或敷于表面，一起排出体外。所以，血的颜色也不是鲜红色的。
\n良性疾患，包括内、外痔，肛裂，大肠息肉，肛瘘等，便血颜色也不完全一样。根据血的颜色及血量的多少也可以区分开。内痔出血量较多，显鲜红色，排便时出血，停止排便后出血一般也停止，并且敷在大便表面，或单独是血，肛门不疼痛。肚裂出血，呈鲜红色，但量较少，肛门疼痛，血敷在大便表面，或手纸上有血。大肠息肉引起的便血，一般看息肉长在哪个部位上，比较靠小肠，颜色就比较深一点，靠结肠就浅一点。结肠炎引起的便血一般为脓血便，量可多可少，颜色不鲜、较暗，敷在便表面，脓与血相混。肛瘘引起的便血，也是脓血使，但它是间断性的，不定期或定期发作，量可多可少，发作时或发作前有臀部、肛门内或肛旁疼痛感，也可以有发热，不能坐等症状。外痔只有在发生血栓后才可以引起出血，量不多，颜色可鲜可暗。
\n痔疮引起的出血常与粪便不相混，且血色鲜红，也可有便血、滴血、手纸上染有血迹等现象。但我们并不能根据这些情况就断言——便鲜血就是痔疮出血。
\n上述内容对便血的症状起因作出了详细的介绍，相信大家已经有了全新的了解，所以在出现便血的情况下，一定要及时的接受治疗，千万不要使疾病发展下去，否则就会影响治疗的效果，同时也会对身体带来更大的伤害，最后小编祝愿大家身体健康，每天都有一个好的心情。
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哪些病会便血
\n我们就一起来看看专家为我们介绍哪些病会便血。
\n便血的症状会出现小肠出血，如肠结核、局限性肠炎、急性出血性坏死性肠炎、小肠肿瘤、肠套叠等。
\n直肠出血，如直肠癌、直肠损害、痔疮、肛裂等。这些也都是便血的症状。(结肠与直肠出血时，由于血液停留于肠内时间较短，往往排出鲜红色或较鲜红色血便。)
\n其他疾病，如各种血液病、流行性出血热、伤寒与副伤寒、钩虫病、维生素缺乏症等，这一系列都是便血的症状。
\n便血的症状还会出现结肠出血，如痢疾、溃疡性结肠炎、局限性肠炎、结肠癌等。
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