The side effects of dried mugwort leaves in water are mainly the following: 1. mugwort leaves are relatively warm and hot, and their prolonged application can lead to symptoms of fire, especially in the hot summer. 2. children are not able to take mugwort leaves in water orally because their organs are not fully developed, and using mugwort leaves can lead to abnormal body development, which is not good for health. 3. women are not able to take mugwort leaves during their menstrual period, and one of the functions of mugwort leaves It is easy to make women’s menstrual flow increase significantly, which is not good for the condition, and it is very easy to induce women’s lack of qi and blood, weakness, and infection. 4, dried mugwort leaves in water will make excess yang energy, which will easily consume yin, and will lead to the patient’s yin deficiency such as night sweats.