Here are Jain-dharma based approaches to address nightmares, kept simple and practical:

• Night-time prayer and mental purity

- Spend a few minutes before sleep in a calm, truthful, non-violent mindset. Recite a short Navkar Mantra or a prayer to the Arihant/Parmatma to invite peace and remove fear. - If you know Pratikraman (confession) practices, you can briefly reflect on any hurtful thoughts or actions from the day and resolve to avoid them, which calms the mind.

• Inner calm and detachment

- Cultivate equanimity (sama-dharna) by gently acknowledging fears without getting carried away by them. - Remember the Jain teachings of non-attachment to outcomes and to sensory experiences; this helps reduce anxious anticipation that can trigger nightmares.

• Sleep routine and environment (spiritual hygiene)

- Keep a clean, quiet, and well-ventilated sleeping space. - Avoid heavy or disturbing media before bed. A light, peaceful reading (Jain scriptures or devotional verses) can help.

• Gentle practices to calm the mind (before sleeping)

- Slow, deep breathing and a few minutes of quiet reflection on compassion and harmlessness (ahimsa) can ease tension. - If you are comfortable, silently repeat a small mantra or prayer focused on peace and protection.

• If nightmares persist

- Consider speaking with a trusted Jain teacher, monk, or elder who can offer guidance rooted in Jain ethics and mindfulness. - Regular daily practice of meditation, self-discipline, and acts of kindness can gradually reduce fear-based dreams by strengthening inner stability.

Note: If you’d like, I can provide the exact Jain prayers or mantras in the original Sanskrit/Prakrit texts and explain their meanings (arth) from a Jain perspective, and I can also point you to specific Jain Knowledge pages that cover related spiritual practices.