Expert answer:
Yes, the woman when she is menstruating can sealing or dyeing hair, provided that products are used which do not contain formaldehyde. If the sealing is just with keratin, you can do it.
THE ANVISA prohibits the use of formalin as a smoothing agent, as the product can cause serious damage to anyone. The professional applying the product is also at risk.
Between the complications caused by formaldehyde are:
- Irritation;
- Itching;
- Burn;
- Swelling;
- Scaling and redness of the scalp;
- Loss of hair;
- Burning and tearing of the eyes;
- Shortness of breath;
- Cough;
- Headache;
- Burning and itching in the nose.
Repeated exposure to the product may also cause:
- Bitter mouth;
- Abdominal pain;
- Nipple;
- Vomiting;
- Fainting spells;
- Sores in the mouth, nostrils and eyes;
- Cancer.
If it is not possible to confirm whether the product is safe or not, do not do the sealing, either during or after the period of menstruation.
