In Jainism, the primary focus regarding personal hygiene and bodily purity is on the principles of ahimsa (non-violence), aparigraha (non-possessiveness), and self-restraint. Jain texts, especially the Shravakachara and the conduct codes laid out for laypersons (śrāvaka) and monks/nuns (śramaṇa), provide guidelines for daily conduct, including issues of cleanliness and bodily functions. However, ancient Jain scriptures do not specifically mention sanitary pads, as these are a modern invention.

Jain texts such as the "Acharanga Sutra" and "Dasavaikalika Sutra" discuss rules for personal hygiene, the importance of cleanliness, and the avoidance of harm to even the tiniest living beings. For example, monks and nuns are instructed to be extremely careful during personal hygiene practices so as not to harm any form of life.

Menstruation and Jainism: Jain texts do mention menstruation, primarily in the context of ritual purity and conduct. Traditionally, menstruating women are advised to refrain from certain religious activities, such as entering temples or participating in rituals, as a form of observance of ritual purity rather than impurity in a moral sense. This is outlined in texts such as the "Vyavahara Bhasya" and later commentaries.

Modern sanitary pads: With the discovery and use of sanitary pads, the focus from the Jain perspective remains on the principles of non-violence and minimal harm. The use of sanitary pads is not prohibited in Jainism. However, some devout practitioners may prefer biodegradable or reusable options to minimize environmental harm, aligning with the principle of ahimsa toward microscopic life forms.

Summary:

• Jain texts do not mention sanitary pads but provide guidance on cleanliness and non-harm.
• The core Jain principles remain valid: minimize harm, practice cleanliness, and observe self-restraint.
• Using sanitary pads is acceptable, but environmentally friendly options are preferred by some, based on Jain values.
• Observances regarding menstruation are based on traditional interpretations of ritual purity, not on the technology used for hygiene.

If you need references to specific Jain texts or commentaries on ritual purity and bodily functions, please let me know.