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烫发时需使用化学药物,而有些人或不同时期的头发不适合用这些药物。少儿不宜烫发。儿童或少女处于发育阶段,他们的头发中蛋白质链处于不稳定阶段,在这个时候受外界化学和电源刺激就会使头发的结构受到破坏而导致毛发脱落。妊娠期和分娩以后十年的妇女,女性生理状态发生较大变化,内分泌也有所改变。此时的发质比较脆弱,头发容易脱落,若再用化学药水烫发,等于雪上加霜,发质经不起损害,导致大量脱发。
Permed when using chemical drugs, and some people or different periods of hair is not suitable for these drugs. Children should not perm. Children or girls in developmental stage, their hair protein chain in an unstable phase, at this time by the external chemical and power supply will stimulate the structure of the hair will be damaged and lead to hair loss. Pregnancy and childbirth after ten years of women, women have a greater physiological status, endocrine also changed. Hair at this time is more fragile, easy to fall off the hair, if the chemical and then perm, equal to worse, the hair can not afford to damage, leading to a large number of hair loss.