Ajwain seeds help in halting pre-mature greying of hair. A component called thymol in ajwain seeds acts as a strong fungicide and germicide. Thus, ajwain seeds can be crushed and applied on the skin to treat infections or cuts. A dreaded ear pain, two drops of ajwain oil are enough. For instant relief from tooth-ache, gargle with a mix of lukewarm water, 1 teaspoon of ajwain and salt. Simply inhaling the fumes of burning ajwain seeds can do wonders for an aching tooth. Besides this, it acts as a great mouth wash and maintains good oral hygiene. Carom seeds may act as a calcium-channel blocker and help lower blood pressure levels.