Answer

In many Jain traditions, people do not enter the derasar during periods as a matter of shuddhi, maryada, and respect for the sanctity of the temple. It is usually a traditional customary rule, especially followed by many families and temples, rather than a rule meant to insult or judge anyone.

Explanation

The idea is that a derasar is a very sacred place, and many communities maintain extra purity and discipline there. Because of this, some temples and families ask women not to enter during menstruation.

Important point:

• This is mostly a customary practice
• It can vary by sect, family, and temple
• The intention is usually respect for temple discipline, not disrespect toward women

Spiritual Understanding

In Jain Dharma, the focus is on:

• Aparigraha: simplicity and restraint
• Shuddhi: purity in conduct and sacred surroundings
• Bhakti: devotion with humility and reverence

So the restriction is often understood as part of maintaining the sanctity of the place, according to tradition. It should be followed respectfully if that is the custom of your derasar or family.

Takeaway

It is best to see this as a traditional observance, not a personal rejection. If your temple follows this rule, respecting it is considered part of Jain maryada. If needed, devotion, prayer, and remembrance of the Tirthankars can still be done with sincerity at home.