Make a paste of ginger, and apply to the affected area. Massaging with eucalyptus oil is very effective. You can also make your own massaging oil. Take 2-3 cloves of garlic, and cut them into small pieces. Put them in 100 ml. of sesame oil or mustard oil (or any other oil if these two are not available). Boil on slow fire for about five minutes. This oil is very good for massaging the area of backache.