In Jain Dharma, covering the head is mainly a social/cultural practice (maryādā), not a basic original scriptural rule like ahiṁsā, satya, brahmacarya, etc.

1. What do the main Jain scriptures focus on?

The primary Jain texts (both Śvetāmbara Āgamas and Digambara āgama-style texts) focus on:

• Vows (vrata)
• Restraint of body, speech, mind
• Non‑violence, non‑possession, celibacy, etc.
• Rules of food, movement, speech, etc. for monks and householders

They do not lay down a universal rule like “your head must always be covered” for all Jains.

2. For monks and nuns

• Śvetāmbara sadhus–sādhvīs:

Traditionally simple white clothes, mouth‑cover (muhpaṭṭī) in many sects, but head is usually not compulsorily covered. Some groups may use a cloth on the head at times, but that is sect‑specific maryādā, not a core śāstric rule.

• Digambara munis:

They are nirvāsana (without clothes) – so clearly, no head‑covering rule here.

This itself shows that “head must be covered” is not a fundamental Jain monastic requirement.

3. For laypeople (śrāvaks/śrāvikās)

In classical layperson texts (like Ratnakarand Śrāvakācāra and similar works), the stress is on:

• Right faith, right knowledge, right conduct
• Observing small vows, avoiding violence
• Proper conduct in temple and before monks (vinaya, respect)

You do not find a core vow such as: “Leaving your head uncovered is adharma” or “Always keep your head covered.”

What you do find in practice is:

• In many Jain families, women cover their head with dupattā/pallā in:

- Temple - Upāśray - In front of elders / sadhus This is based on Indian modesty and respect customs, shared with surrounding Hindu and sometimes Islamic culture, not uniquely Jain.

• In some places, men are told to remove caps/helmets in temple, which is the opposite practice (uncovering the head as respect), again a local maryādā, not a pan‑Jain śāstric command.

4. So where did it come from?

Putting it simply:

• Original / foundational Jain Dharma:

No clear, universal rule: “Every Jain must cover the head.”

• Later and local practice (maryādā, ācār):

- Influenced by regional Indian customs of modesty and respect - Different in various sects and regions - Often more about respect in a holy place or before elders than about “sin” or “punya” in themselves

5. How to view it spiritually?

From a Jain dharma point of view:

• The real essentials are:

- Non‑violence - Control over passions - Observing vows - Inner purity

• Head‑covering or not is a secondary outer discipline, useful if it:

- Helps cultivate humility and respect - Does not become a cause of pride, anger, or quarrel

So, yes, it is mostly a later/social practice, not an original, absolute Jain scriptural rule.