structural:summarization, structural:scholar_edition
Chemistry

There are various psychological, physical and emotional symptoms of having good chemistry with another person. It has been described as a "combination of basic psychological arousal combined with a feeling of pleasure". The nervous system gets aroused, causing one to get adrenaline in the form of "rapid heartbeat, shortness of breath, and sensations of excitement that are often similar to sensations associated with danger". Other physical symptoms include "blood pressure go up a little, the skin...flush, the face and ears...turn red and... feeling of weakness in the knees". However, all these symptoms vary on an individual basis, and not all individuals may experience the same symptoms. One can feel a sense of obsession over the other person, longing for "the day to that person". One can also uncontrollably smile whenever thinking about the other person.