if it is a problem inside your body like broken bones ect. then a delicious way to have it it get several leaves and stick them in your blender with OJ and some water and ice have that a few times a week and it will definitely heal a lot faster. if it is outside of your body then do what lauraAT said you can also find comfery paste in stores make sure you check the ingredients first and make sure there is no soy it will cause cancerous effects.:)
The best way to use comfrey is by directly applying it to the affected area. Make a paste using the leaves, water and oil and apply it on the skin. It can be ingested in some instances. However, it can have adverse effects when consumed in large amounts.