Zhandu balm is very effective for pain relief, specially I use this for headache. Even my family members use it for different reasons. My mother uses it for backache my father uses it for knee pain. I think this product is very useful. During rainy season it is very useful because in these days chances of cough and cold increases so I always keep zandu balm in my pocket so that I can use it in my office also for headache instead of taking leave for a normal headache its better to have zandu balm in my purse.