Herbs are used in two distinct ways. One is in acute situations, providing relief for things like an upset tummy or menstrual cramps. The other is to nourish and regulate organs and systems, revitalizing the body's own ability to maintain overall good health.
The first way is fast. The second often takes time. A robust herbal medicine chest contains both types of herbal remedies. Herbs like yarrow, skullcap, plantain, wild lettuce, motherwort, and lemon balm are usually used for acute situations. It is best to take them immediately at the on-set of the issue and at regular intervals to have the most desired effect.