Syphilis is contagion of sex of a kind of chronic whole body, affect syphilis helicoid be caused by by feculent sexual intercourse more.

Luetic is behaved with infection period and infection way have affinity, general component is acquired character (acquired) syphilis of etc of syphilis, congenital syphilis 3 kinds; By disease period cent is first phase, 2 period (inchoate) reach 3 period (terminal) syphilis.

First phase syphilis; Expression is the person that be affected to enter the skin or mucous membrane place to produce wound in syphilis helicoid, form hard chancre and local rigid lymph node phlogistic (congenital syphilis does not produce chancre) .

2 period syphilis; Syphilis helicoid is sowed via lymphatic system medicinal powder. Of afterwards enter blood to cross a loop, adherent go up at the imperceptible little blood vessel of skin mucous membrane, because of its toxin action, cause skin mucous membrane to send rash, namely 2 period syphilis rash. Main show is appear group by group new student and dated sex rash, the hair that show extensive and symmetry distributing. Rash has a variety of pattern, can have rash of spot shape syphilis, rash of rash of rash of papule sex syphilis, pustular sex syphilis, palm Zhi syphilis and special model syphilis rash, if latter is compressed disease of armour of sex of rash of syphilis of sex of white demon of eczema, syphilis, pigment, psoriasis syphilis rash, syphilis and syphilis sex lose one's hair.

The occurence rate of syphilis sex lose one's hair occupies 3 ％ about one 4 ％ , trichomadesis is cross a gender, after fighting syphilis to treat, hair is rapid second birth.

Because syphilis helicoid encroachs the capillary of head hair area,syphilis sex lose one's hair produces a likelihood, make hemal wall hair falls ill to change and jam, send for blood undesirable, wool bursa produces provisionality obstacle, if the beans is big,appear or the area of irregular lose one's hair of armour lid size. Trichomadesis area border is not clear, as rat bite or bug corrode shape, good hair is mixed at occipital, occipitalia side head. The trichomadesis area area that happens in the head is larger, hair accident is uneven, this is the result that encroachs as a result of the blood capillary inside trichomadesis area by different level.

Syphilis sex lose one's hair is not permanent or scar sex bald hair, it is OK second birth, if undertake syphilis is treated in time fighting, the hair can be in 6 ～ the 8 second birth inside week, do not treat even also but second birth.

Luetic lose one's hair also sees at inchoate and congenital syphilis, the patient is premature mostly, trichomadesis phenomenon arrives it is thus clear that when be born, trichomadesis area is wider, but amount is not much, wellability erythema is seen in trichomadesis place. The leather damage of the cause that causes trichomadesis and soak and syphilis sex blood-vessel are phlogistic have affinity.
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