Irani-tebb or Irani Traditional Medicine, also called Tebb e Sonnati is one of famous forms of traditional medicine which is grounded in the four humours concept: Phlegm (Balgham), Blood (Dam), Yellow bile (Ṣafrā') and Black bile (Saudā'). Some traditional medicine forms are in this base. Unani and Graeco-Arabic are the most famous of that. It is based on the teachings of Greek physician Hippocrates and Roman physician Galen, and developed by Rhazes, Avicenna (Ibn Sena) into an elaborate medical system.