Longan, being warm in nature, is a kind of medicinal herb that is prone to cause fire, which may result in fire if taken in excess or not in the right amount. Longan has the effects of tonifying the heart and spleen (tonifying the heart and spleen with tonic medicines), nourishing the blood and calming the mind (stabilizing the mind and soothing the emotions by nourishing the blood). It should be noted that it is contraindicated for those with dampness (too much dampness causing fullness and discomfort in the spleen and stomach), or those with stagnant fluid (water retained in the body), phlegm or fire. If you need to take this medicine to treat a disease, it is recommended to do so under the supervision of a doctor.