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Moms manage the sweat rash under heavy postpartum breasts by keeping the fold dry with dusting powder and applying Boroline, and by removing the bra to air the area out - at least at night. If you're breastfeeding, wipe off any powder or ointment before a feed, since the smell can put the baby off.
⚠️ Caution:A sweat rash in the skin fold under the breast can turn into a fungal or bacterial infection if it stays damp - see a doctor if it becomes raw, oozes, smells, spreads, or doesn't settle with drying and basic care, as you may need a prescribed antifungal or cream.
Postpartum moms feel miserable and self-conscious about the constant itch and rash under heavier breasts, made worse by hormones and humid weather. The community's practical fixes - keep it dry, powder it, dab on Boroline, and air the area out overnight - bring relief, with the reminder to clean it before nursing so the baby still feeds happily.
Here's what moms in our community shared based on their own experience.
Dusting powder plus Boroline worked for me during pregnancy for exactly this. And remove the bra to air the area out, at least for a while at night.
If you're breastfeeding, just make sure you clean the area before a feed - sometimes babies won't latch because of the fragrance or any smell.
The information shared on this page comes from real experiences of mothers in our community. While we strive to provide helpful insights, this content is for informational purposes only and should not be considered medical advice. Always consult with your pediatrician, healthcare provider, or other qualified medical professional for any questions regarding your child's health or development.
Last reviewed: July 13, 2026
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