Brazilian Hair Straigtening is dangerous and can cause long term side effects due to the exposure to formaldehyde. Aside from that, my hairdresser stopped doing it in February and said that it was going to b banned soon and didn't want to face any liability.
I wouldn't get it done because of that especially since I plan to get pregnant in the next few years and who knows what are the long-term effects.
1) Some people are naturally highly sensitive to formaldehyde. It stays in the immune system and causes sensitivity.
2) Runny nose, sore throat, headache, itching, and irritated eyes can occur with low levels of exposure.
3) It is also a known carcinogen, and smokers in particular are at a greater risk for cancers of the airways, including nasal passages when they are exposed to formaldehyde.