Aromatherapy is a holistic treatment, utilizing essential oils extracted from flowers, spices, fruits, woods and leaves from aromatic plants for their esthetic, psychological and medicinal applications to create balance and harmony to the body, mind and spirit. Aroma therapy is one of the most ancient healing arts & traces its origin to 4500BC, when Egyptians used aromatic substances in medicines. The term Aromatherapy was coined by Prof. Gatte`Fosse, a French cosmetic chemist. According to classical unani texts Aromatherapy has been used for Ilaj-bit-tadbeer (regimental therapy) dating back to Hippocratian era, where they used aromatherapy for abzan (sitzbath) lakhlakha (inhalation), thabkheer (steaming), for different illness using essential oils for e.g. From leemoon, ajwain, anisoon, oodh and ustuqudoos. The inhaled aroma from “essential” oils is widely believed to enhance the rooh stimulating the functions of aza raisa. Essential oils can also be absorbed through the skin, where they travel through bloodstream and promotes whole-body healing. Aromatherapy activates areas in nose called olfactory receptors, which send messages through nervous system to brain. The oils may activate certain areas of brain, like limbic system, which plays a role in controlling emotions. They also have an impact on your hypothalamus, which may respond to the oil by creating a good feeling in brain. Its use ranges from pain relief, mood enhancement and increased cognitive function to treat asthma, insomnia, fatigue, depression, inflammation, alopecia, cancer, arthritis, erectile dysfunction, menstrual disorders, menopausal syndromes, etc. This paper mainly highlights the different use of aromatherapy, action of various drugs on body, and modes of application based on classical unani texts, modern findings and developments in aromatherapy.