In Jain dharma, your soul never becomes impure because of menstruation. Periods are a natural body process. The rules are only about ritual cleanliness (shuddhi) and maryādā (tradition).

If you get your periods in the middle of pūjā, you can think like this:

1. If you are doing pūjā at home (with idol, dravya, etc.)

• Gently stop the dravya‑pūjā (abhishek, touching idol, rice, flowers, etc.).
• With respect, keep remaining pūjā items aside.
• In your mind, do Namokār Mantra and ask forgiveness:

“If any mistake happened unknowingly, may it be forgiven.”

From that moment till your period days are over, traditionally you avoid:

• Touching idols and pūjā items
• Doing abhishek, aṅg‑pūjā, snātra, etc.
• Handling scriptures

But you can and should continue bhakti in other ways:

• Mental Navkār mantra
• Stavan or bhajan softly (without touching idol/pūjā room)
• Prārthanā (prayer) and good thoughts for all jīvas

2. If you were in a temple and periods started

• Quietly finish, step back, and stop further dravya‑pūjā.
• Do darshan from a distance only if your temple’s rules allow.
• After coming home, bathe when you can and rest; don’t feel guilty.

Traditionally during menstruation, many Jain families follow:

• No entering garbhagṛha
• No touching mūrti, śāstra, pūjā‑dravya

But:

• There is no scriptural rule that your atma is low or bad.
• Inner bhakti, pratikraman‑bhāva, and kindness are always allowed.

3. What to do after periods end

Common practice:

• When bleeding has fully stopped, take a good bath, wear fresh clean clothes, and then restart normal pūjā according to your family/temple maryādā.

If your local saṅgh or guru has given specific rules, follow those calmly.

Most important:

• Do not feel fear or sin‑guilt.
• Menstruation is not a fault of the soul; it is just a time to keep a bit more external shuddhi and hygiene, and to focus more on bhāva‑pūjā (inner devotion).

You can read more detailed Jain guidance on this topic here: