Traditional Use References Commonly known as ‘knitbone’, Comfrey ointment has a special affinity with bone and tendon healing. Good for bone pain and bone injuries like shin splints. Excellent for deep tendon problems eg RSI ( Repetitive Strain Injury) Relief for old sprains and strains and reoccurring muscle soreness. The early Greeks relied on Comfrey as a paste and a poultice to treat their battle wounds.