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.pptx

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1、AlopeciaAlopecia123Definition of alopeciaCauses and hazards of hair lossHow to improve hair loss？contents1What is hair loss？Definition of alopeciaAbnormal hair loss is called alopecia.Healthy people will lose 50-100 hairs every day,because the growth of hair is periodic（间歇的，周期的）,the hair in the grow

2、th period will not fall off easily,and the hair in the rest period is in a state of easy fall off.If it is found that the number of hair shedding exceeds 100 or more every day,or the total amount of hair is significantly reduced than before,or it is found that there is obvious thinning of local hair

3、,or even patches formed by complete hair shedding,this is abnormal hair loss.2Causes and hazards of hair loss1What are the causes of hair loss？1.PhysiologicalPhysiological（生理的）alopecia:alopecia:The The so-so-called called physiological physiological alopecia alopecia means means that that no no more

4、 more than than 70-100 70-100 hairs hairs fall fall off off every every day,day,a a certain certain amount amount of of hair hair falls falls off off every every day,day,and and a a certain certain amount amount of of hair hair grows.grows.Although Although there there is is alopecia,alopecia,the th

5、e hair hair is is not not sparsesparse（稀少的）,which which is is a a kind kind of of physiological physiological alopeciaalopecia.2.Pathological（病理的)alopecia:First,androgenic(雄性激素的）alopecia.On the basis of heredity（遗传）,androgenic alopecia is a type of alopecia caused by the scalp（头皮）being too sensitive

6、 to androgens,which can occur in both men and women,mostly men;Second,alopecia areata,the cause of which is unknown at present,but studies have found that it is mainly related to autoimmunity,including emotional and other stress reactions3.Resting period hair loss:It is due to some mental factors su

7、ch as weight loss or disease,especially staying up late to smoke,that many hairs enter the resting period in advance2What are the causes of hair loss？1What are the effects of hair loss？1.The main harm of hair loss is that it affects the beauty,social interaction,study and work of patients.2.Hair los

8、s narrows interpersonal relationships.Because of the image problem,alopecia people are often stuck in their laurels.Their breakthrough in interpersonal relations is often repeated.Over a long period of time,alopecia people are willing to the status quo and are in a narrow living space.It is difficul

9、t for him to achieve great development in this society.3How to improve hair loss？添加标题1.In terms of mental factors:being in a state of tension for a long time will lead to poor scalp blood circulation and hair loss due to lack of nutritional supply.Patients need to adjust their work and rest,ensure a

10、dequate sleep,work and rest,and ease tension and anxiety.At the same time,it can massage the scalp regularly to promote the blood circulation of the head and reduce hair loss2.In terms of dietary factors:refuse to eat high-fat food frequently,eat more foods rich in vitamins and trace elements(微微量量元元

11、素素）,including fruits and vegetables,such as apples,tomatoes,etc.,and eat less greasy（油油腻腻的的)food.1How to improve hair loss？3.Disease factors:alopecia patients need to go to the hospital for treatment,such as high androgen level,liver and kidney diseases,which cause alopecia,and they can recover fast

12、er with medication under the guidance of professional doctors;4.Other factors:If people often perm(烫烫发发）and dye（染染发发）their hair,it is also easy to cause hair loss.You need to reduce the number of hairdressing and wash your hair with warm water.2How to improve hair loss？Have you ever experienced hair loss?Why is it causing you to lose your hair?whats your mood like?THANKYOU