Arnica is one of the best remedies for pain caused by injury or trauma. If you are going for a tooth extraction, taking Arnica about 30 minutes before the procedure helps reduce pain, soreness, and the after-effects of dental trauma. It is also very helpful for people who experience severe pain after braces are tightened. Arnica helps the body cope with the stress and pain caused by pressure on the teeth and gums. In simple words, whenever pain happens because something was hurt, pressed, or injured — Arnica can be a great support.