The word pichu means soaking a piece of cloth or cotton in specific liquids like oils, herbal juices, decoctions etc. In this treatment the cloth or cotton piece soaked in the liquid will be kept on the affected parts. The temperature of the liquid can be cold or warm according to the disease condition. If it is warm its temperature should be kept uniform by warming it in between. According to the body part the name of the pichu can be different, for eg. Pichu on the lower back is called katipichu and pichu on the head is called siropichu.
The warmth of the oil improves the blood circulation on that body part and stimulates the peripheral nerve endings. This will help for the quick absorption of the medicaments to the effecter organs. This makes the lubrication of the joints and relieves joint stiffness.