Though primarily practiced in South Asia, Unani is based on principles that were developed by Galen, Rhazes and Hippocrates. Though it was later advanced and put into practice by Avicenna, the Muslim scholar.
It is often compared to Ayurvedic medicine due to closely related beliefs and theories. Both focus on the main elements of life, which include earth, wind, fire and water. Both believe that the reason for illness or ailments is due to disproportion of the elements. The aim of the medicine, or other forms of treatment, is to restore the balance of the elements.
The medicine typically given in Unani medicine is used to strengthen and encourage the immune system to work at its ideal level, in order to be strong enough to fight off and prevent diseases. Unani medicine has helped cure diseases such as respiratory, liver, skin, musculo skeletal and nervous system ailments.