There are many flower essence systems available from producers all over the world. I use mainly Bach Flower Remedies and Australian Bush Flower Essences.
Flower essences can be used to help all emotional states and can also be used to help physical problems. Many physical problems have their origins in negative emotional states, once the negative emotion is resolved it can be quite incredible to see how the physical problem improves. It’s impossible to overdose on flower essences and they have no side-effects, they are easy to take, perfectly safe, and can be used for adults, children and animals alike. It’s even possible to revive ailing plants by adding emergency essence into the water when watering!