Cayenne pepper stops my room mate's tingling in fingers from nerve damage, improves his circulation, and makes him feel all around better immediately. Pain is usually due to inflammation, so you need anti-inflammatory herbs and to try to eliminate the cause of it. MSGs and food allergies are usually a factor whether you were injured or not, so adding anti-inflammatory and antioxidant herbs to your food and avoiding foods you may be allergic to or that contain Mono-Sodium-Glutamat (Natrium Glutamat) is first step to reduce inflammation and allow healing. I had chronic pain for 15 years from spinal injuries and Arthritis that wouldn't heal until I changed my diet and avoided MSG. An Iodine or sulfur deficiency will cause your symptoms too. MSM is a sulfur supplement.