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口疮是口腔溃疡的俗称,是一种儿科常见的、多发的口腔黏膜疾患.口腔溃疡好发于舌的边缘、唇、颊、牙龈或上腭黏膜处.口疮每次出现时先在口腔里出现有疼痛感的小红点,1~2天后形成黄豆大小的灰白色溃烂斑,底浅,边缘整齐,周围有红晕,同时在表面有黄白纤维素性渗出物覆盖.溃疡少则一两个,多则数十个,但都孤立存在.可单发或多发在口腔黏膜的任何部位,一般在10天左右可自愈.口疮的局部症状比较显著,有剧烈的烧灼样痛,遇冷、热、酸、咸等刺激都使疼痛加重,语言、饮食均感困难,持续4~5天后转入愈合期,愈合不留任何疤痕,但可以反复发作.其全身症状多不明显,一般没有发烧等症状,不影响玩耍和学习.本病多见于青少年和青壮年.随天气、情绪、劳累等因素可复发. 相似文献
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七岁到十二岁为乳牙和恒牙的交换期。在交换过程中常因颌骨发育不足,又因尖牙的萌出,在侧切牙和第一双尖牙之后,常因间隙不够而向唇侧错位萌出。在错位牙中上颌尖牙错位萌出是常见的现象。因为尖牙的牙尖唇向突 相似文献
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您大概觉得:骨头那么硬,也会长出肿瘤,真不可思议!但骨头里能长肿瘤是千真万确的。虽然骨肿瘤不像肺癌等那么常见,但也不少见。骨肿瘤有两大类:一类为骨头本身长出的,称为原发性骨肿瘤;一类由身体其他部位的肿瘤转移而来,称为转移癌。中老年人的骨肿瘤有一个很大的特点,即多数为恶性,因此不可等闲视之。 相似文献
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近些年来,从我院的门诊情况统计来看,孕妇胎盘低置状态和前置胎盘发生率接近5%.这个数字不算低.前置胎盘的发病率国外报道0.5%,国内报道0.24%~ 1.57%,经产妇尤其是多产妇,其发生率相对较高.而北医三院作为北京市危重症孕产妇转诊抢救中心,接收因前置胎盘转诊至此的患者不在少数.孕妇前置胎盘如不加注意会引起无痛性阴道出血,且容易反复,导致贫血;而出血易引发早产等问题.特别是头胎剖宫产的孕妇,怀二胎出现“凶险性前置胎盘”的几率会增加,易出现产后大出血.因此,准妈妈要加强产前保健,对相关知识有一定的储备. 相似文献
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Adam Burgess 《Health, risk & society》2009,11(6):527-540
This article reflects on UK Chief Medical Officer's (CMO) 2009 announcement that alcohol abuse should be understood as a problem of ‘passive drinking’. This was an attempt to instrumentally problematise drinking drawing on the successful campaign against ‘passive smoking’. An implausible term that originated as an anti-state interventionist joke, both ‘passive drinking's’ lack of impact but also the lack of criticism its revelation attracted are considered. This curious episode is explained in relation to the CMO's distinctive precautionary style, the growing campaign against alcohol in the UK and a wider acceptance of a contemporary politics of health risk where dramatisation has become relatively routine. Despite the failure of this initiative, a widely drawn ‘second hand effects’ case against alcohol persists. More generally, risk/harm framed argument has filled the vacuum left by the discrediting of moral-based approaches and recast a similarly polarised approach to a socially complex practice. This episode indicates a pragmatic ‘good lie’ approach toward lifestyle health risk promotion legitimised by a superficial ‘evidence based’ foundation. 相似文献
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