1. Natural hair quality is poor
The original hair is worse, easy to broken people, such as
iron deficiency, thyroid problems and endocrine disorders are not suitable
for dyeing perm.
2. Pregnancy and women within six months after childbirth
Throughout the pregnancy and breast-feeding process, should avoid contact
with unnecessary chemicals, so as not to affect themselves and their children.
During this period, women's physical condition has changed, the hair is more
fragile, easy to fall off, and then use chemicals to dye hair, but also
exacerbate hair loss, but also affect the normal growth and development of
children.
3. Scalp damage
Including eczema, psoriasis, folliculitis, trauma and so on. Such people's
skin barrier is not complete, hot will not only aggravate the original skin
problems, but also increase the damage at the skin of the absorption of harmful
substances.
4. Children, the elderly and liver and kidney dysfunction
Children's skin is delicate, more susceptible to chemicals, allergies, and
the body's ability to detoxify. Elderly liver and kidney function gradually
weakened, harmful substances may accumulate in the body, increasing health
risks. Liver and kidney dysfunction, the body's detoxification capacity has
problems, but should not increase its burden, resulting in aggravating.
Hot hair dye damage to the hair is very large, so pay attention to select the
qualified products, and find an experienced hairdresser operation, usually pay
attention to conservation, will minimize damage. In addition, hair coloring
interval should be as large as possible to more than 3 months is appropriate.
Hair before, after the ear, neck and other parts painted lotion to prevent hair
dye directly to the skin, after the hair should be thoroughly cleaned.
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