Shankh Mudra – for relieving throat / speech ailments It also balances the Thyroxine secretion from Thyroid gland. However, the use of Shankh Mudra should be limited to 10-15 minutes as when needed. Never do this mudra after taking your meals.  Encircle your left thumb with the four fingers of your right hand. Touch the right thumb to the extended middle finger of your left hand. The two hands should look like a conch shell.