Unit 2 Improving Yourself 课外拓展 脱发介绍 课件-高中英语外研版（2019）选择性必修第二册

Alopecia123DefinitionofalopeciaCausesandhazardsofhairlossHowtoimprovehairloss？contents1Whatishairloss？DefinitionofalopeciaAbnormalhairlossiscalledalopecia.Healthypeoplewilllose50-100hairseveryday,becausethegrowthofhairisperiodic（间歇的，周期的）,thehairinthegrowthperiodwillnotfalloffeasily,andthehairintherestperiodisinastateofeasyfalloff.Ifitisfoundthatthenumberofhairsheddingexceeds100ormoreeveryday,orthetotalamountofhairissignificantlyreducedthanbefore,oritisfoundthatthereisobviousthinningoflocalhair,orevenpatchesformedbycompletehairshedding,thisisabnormalhairloss.2Causesandhazardsofhairloss1Whatarethecausesofhairloss？1.Physiological（生理的）alopecia:Theso-calledphysiologicalalopeciameansthatnomorethan70-100hairsfalloffeveryday,acertainamountofhairfallsoffeveryday,andacertainamountofhairgrows.Althoughthereisalopecia,thehairisnotsparse（稀少的）,whichisakindofphysiologicalalopecia.2.Pathological（病理的)alopecia:First,androgenic(雄性激素的）alopecia.Onthebasisofheredity（遗传）,androgenicalopeciaisatypeofalopeciacausedbythescalp（头皮）beingtoosensitivetoandrogens,whichcanoccurinbothmenandwomen,mostlymen;Second,alopeciaareata,thecauseofwhichisunknownatpresent,butstudieshavefoundthatitismainlyrelatedtoautoimmunity,includingemotionalandotherstressreactions3.Restingperiodhairloss:Itisduetosomementalfactorssuchasweightlossordisease,especiallystayinguplatetosmoke,thatmanyhairsentertherestingperiodinadvance2Whatarethecausesofhairloss？1Whataretheeffectsofhairloss？1.Themainharmofhairlossisthatitaffectsthebeauty,socialinteraction,studyandworkofpatients.2.Hairlossnarrowsinterpersonalrelationships.Becauseoftheimageproblem,alopeciapeopleareoftenstuckintheirlaurels.Theirbreakthroughininterpersonalrelationsisoftenrepeated.Overalongperiodoftime,alopeciapeoplearewillingtothestatusquoandareinanarrowlivingspace.Itisdifficultforhimtoachievegreatdevelopmentinthissociety.3Howtoimprovehairloss？添加标题1.Intermsofmentalfactors:beinginastateoftensionforalongtimewillleadtopoorscalpbloodcirculationandhairlossduetolackofnutritionalsupply.Patientsneedtoadjusttheirworkandrest,ensureadequatesleep,workandrest,andeasetensionandanxiety.Atthesametime,itcanmassagethescalpregularlytopromotethebloodcirculationoftheheadandreducehairloss2.Intermsofdietaryfactors:refusetoeathigh-fatfoodfrequently,eatmorefoodsrichinvitaminsandtraceelements(微量元素）,includingfruitsandvegetables,suchasapples,tomatoes,etc.,andeatlessgreasy（油腻的)food.1Howtoimprovehairloss？3.Diseasefactors:alopeciapatientsneedtogotothehospitalfortreatment,suchashighandrogenlevel,liverandkidneydiseases,whichcausealopecia,andtheycanrecoverfasterwithmedicationundertheguidanceofprofessionaldoctors;4.Otherfactors:Ifpeopleoftenperm(烫发）anddye（染发）theirhair,itisalsoeasytocausehairloss.Youneedtoreducethenumberofhairdressinga