Can pregnancy soften hair?
Generally, hair relaxing is not recommended during pregnancy. If any discomfort occurs, prompt medical consultation is advised. A detailed analysis follows:

The chemical agents used for hair relaxing contain multiple irritants—including thioglycolic acid and ammonium hydroxide—and are not composed solely of natural, gentle ingredients. During pregnancy, women experience significant hormonal fluctuations, resulting in a relatively weakened scalp barrier and increased follicular permeability. Consequently, harmful components from the relaxing agents can more readily penetrate the scalp, enter systemic circulation, and potentially impair normal fetal development. Additionally, the pungent fumes emitted by these agents may irritate the respiratory tract—already hypersensitive during pregnancy—exacerbating symptoms such as nausea, dizziness, and chest tightness. They may also trigger scalp redness, itching, or allergic reactions. Moreover, hair quality naturally becomes more fragile and damaged during pregnancy; exposure to harsh chemicals further compromises the hair cuticle, leading to dryness, split ends, and hair loss—making the procedure counterproductive.
During pregnancy, hair care should prioritize mild, natural approaches. Daily use of fragrance-free, non-irritating hair care products specifically formulated for pregnant women is recommended. Hair should be gently washed with lukewarm water, and all chemical-based treatments—including perming, coloring, relaxing, and straightening—should be avoided. Avoid aggressive pulling or tugging on hair; instead, regularly brush hair to maintain cleanliness and freshness, and ensure thorough yet gentle scalp cleansing. Coupled with a light, balanced diet and adequate rest, these practices effectively support both hair and scalp health throughout pregnancy.