When is jealousy healthy? When is it dangerous?

For every action there is a reason, and every action has consequences. To be able to determine if the jealousy you are feeling is healthy or dangerous for your relationship is by observing how you (and your partner) express or respond to jealousy. They say jealousy is like salt in food. A little can enhance the flavor but too much can spoil the pleasure, and in other circumstances, can be life-threatening.