Crab Apple is the essence of purity. If you are feeling that touching something will contaminate you, or for those who have problems with sex because it's 'dirty', Crab Apple will bring relief.
Crab Apple is also for those who demand perfection from themselves. Even if they do a wonderful job, they are always looking to see what they could have done better. They never give themselves credit.
This remedy is also one that can be taken externally. It is said that 15 drops in a bath is very helpful for cleansing.
It is also said that 4 drops into a watercan will help remove blights from plants.
It is also part of Rescue Cream, though not Rescue Remedy.
For Empaths:
The empath picks up a lot of, what I tend to call, psychic pollution. That is negative energies that we tend to absorb like a sponge.
Sometimes it can feel like you've got a dark layer of sewage clinging to your aura.
It's not unusual for the empath to feel polluted or violated by another's aura or energy. This may happen in crowds, parties, places where the vibrations are negative or low. The empath's first response will be to get away from such areas and people as soon as it's politely possible.
While there are many ways of helping to cleanse your energies, such as showers, smudging, meditation, etc, the Bach Flower Remedy, Crab Apple is able to help with those feelings of being polluted or unclean.