The sense of smell lies in the Limbik system, which affects our brain's motivation, memory and creativity. For this reason, the smell affects people's psychological state, work performance and behavior. In the researches conducted, it is concluded that the decisions given by affecting the part of the mind related to the emotions of the mind are more emotional.

While a pleasant smell can invigorate our emotions like refreshing, happiness and self-confidence, some smells have soothing and relaxing effects. It also has the potential to treat psychological problems such as smell and depression. The positive effects of smells often make our life easier and more relaxed. Examples include; lavender and bergamot scents increase serotonin and endorphin secretion in the brain from 8 to 12 times, providing a mental and physical relaxation that makes them feel happy and positive. With the smell of lemon, basil, eucalyptus, coriander, laden, sandalwood ready to learn, the roses smell of rose in the bedroom is also used to prevent forgetfulness.

In addition to the pleasant smells, the bad smells have many physiological and psychological effects, which, contrary to the good smells, can affect us negatively and enable us to get away from the person or place immediately. Bad smells can cause nausea or even vomiting in some people ... It can distract concentration and make it difficult to focus. How can we reduce the effect of bad smells? Here again the odor enters the circuit and when we are exposed to bad smells we can still benefit from the effects of smells. Essential oils, cigarette-smoke, garbage, etc. including all bad smells. And even hospitals take advantage of essential oils to prevent the spread of bacteria, viruses, molds and infections. While the smell can be a savior in people's lives, it can also have negative consequences from time to time. Most odor and essential oils found in the market are dangerous for your health because of the chemicals it contains. One of the most important things we need to be aware of when buying and using the fragrance is how the production is. It is important to make sure that the fragrance and essence oils are pure and therapeutic. It is up to us to use the only sensible one that has a subconscious effect in the right way.