What is a grudge? A persistant feeling of resentment, especially due to some cause, such as insult or injury. Do you have free renters in your head? I'd say mine set up temporary housing and I try to evict them as quick as possible. Holding a grudge gives your power over to someone else and hurts you worse than them. Grudges will control your thoughts, attitude and disposition. It's not healthy. So what's the solution? Forgiveness. It clears the mind, if you truly embrace it. We are all guilty of saying or doing things worthy of a grudge so if you want forgiveness, you also have to give it. If you're unforgiving, you may pay the price repeatedly by bringing anger and bitterness into every relationship and new experience. Your life may become so wrapped up in the wrong that you can't enjoy the present.
Budge that grudge right out of your mind. Nothing is free in this world so don't give away your mind and thoughts to anger, but instead let peace, compassion and understanding take its place.