A warm bath can help you relax and might make you more comfortable during the later stages of pregnancy, but it’s unlikely to induce labor on its own.
It’s important to ensure the water isn’t too hot to avoid raising your core body temperature. The ideal temperature should be warm, not hot, around 98–100°F (37–38°C). Raising your core body temperature too much can be risky during pregnancy and labor as it can lead to hyperthermia, which might reduce blood flow to the baby and cause fetal distress.
If you’re considering adding some extra relaxing things to your bath, there’s no evidence to suggest that bath bombs or Epsom salt can induce labor. In fact, an Epsom salt bath may be a good option, since it can be soothing and help relieve muscle aches and swelling. If you decide to use bath bombs, choose ones without harsh chemicals or strong fragrances that might irritate your skin or respiratory system.