Ashru
The upadhatu (superior byproduct) of majja dhatu; lacrimation that lubricates the eyeball and keeps the cornea clean.
What is Ashru (Tears)?
Tears are easy to take for granted, yet Ayurveda reads them as a quiet signal of how well one of the body's deepest tissues is doing. The moisture in your eyes is linked to the health of your nervous system.
Ashru (Ashru) means tears, or lacrimation. In Ayurveda it is the superior byproduct (Upadhatu) of marrow and nerve tissue (Majja Dhatu).
Its main job is practical: tears lubricate the eyeball and keep the cornea clean. Because Ashru is produced from marrow and nerve tissue, it is also taken as a reflection of that tissue's health.
The Core Principles of Ashru
Tears are a byproduct of marrow and nerve tissue
Ashru is classed as the upadhatu, or superior byproduct, of Majja Dhatu, the tissue of marrow and nerves. Tears are therefore not a stand-alone fluid in this view; they come from a deeper tissue.
Tears protect the eye
The primary function of tears is to lubricate the eyeball and keep the cornea clean. The cornea cannot be exposed to dry air, and blinking spreads tears across the eye to cleanse it.
Tear quantity reflects tissue quality
Scanty tear secretion is read as a sign of inferior Majja Dhatu. Healthy Ashru is taken to reflect a healthy nervous system.
How Ashru Works in Practice
Ashru gives a practitioner a simple, visible clue about a tissue that is otherwise hard to observe. Because tears are the byproduct of Majja Dhatu, scanty lacrimal secretions point toward weakness in marrow and nerve tissue.
The anatomy described in the source explains a familiar experience. Tear glands sit just above the eyes, and small channels called the nasal lacrimal ducts open from the eyes into the nose. That is why your nose runs when you cry.
For your own awareness, the takeaway is to notice the moisture of your eyes. Blinking is the eye's built-in cleansing action, and eyes that stay well lubricated fit the Ayurvedic picture of healthy Ashru and healthy Majja Dhatu.
Frequently Asked Questions
What is Ashru in Ayurveda?
Ashru means tears or lacrimation. It is considered the superior byproduct of Majja Dhatu, the tissue of marrow and nerves.
What do tears do for the body?
Tears lubricate the eyeball and keep the cornea clean. The cornea cannot be exposed to dry air, and blinking cleanses the eyes.
Why does my nose run when I cry?
Small channels called the nasal lacrimal ducts open from the eyes into the nose. Tears drain through them, which is why the nose runs when you cry.
What does it mean if I make very few tears?
In Ayurveda, scanty lacrimal secretion is read as a sign of inferior Majja Dhatu. Because tears reflect marrow and nerve tissue, low tear production points to that tissue.
How are tears connected to the nervous system?
Ashru is the byproduct of Majja Dhatu, which covers marrow and nervous tissue. For that reason tears are said to reflect the health of the nervous system.
Medical Disclaimer: The information on this page is for educational purposes only and is not intended as medical advice. Ayurvedic treatments should be pursued under the guidance of a qualified practitioner (BAMS/MD Ayurveda). Always consult your healthcare provider before starting any new treatment. Content is sourced from classical Ayurvedic texts and may not reflect the latest medical research.