Garudapurana 1.158.11

1.158.11

tatsaṃkṣobhādbhavetsāsṛṅmāṃsamadhvani rugbhavet /
tatra bātābhisṛtyārtodantān khādati vepate //

From its irritation, there is blood and pain in the passage along the muscular tissue. / In that condition, afflicted by the movement of vāta, one grinds the teeth and trembles;