Asthma is a very common disease in respiratory medicine and often leads to the onset of asthmatic bronchitis due to many complex factors. Therefore, whether asthma patients can eat watermelon when they have an attack depends on the season they are in. If it is in the cold winter when an asthma attack occurs, it is generally not recommended to eat watermelon. Because watermelon itself is a cold-natured fruit, and the winter season is already quite cold, it is not suitable to eat watermelon during this season. However, if the asthmatic condition occurs in the summer, when the climate is relatively hot, it is appropriate to eat some watermelon. Because watermelon can not only replenish fluids and relieve heat, but it can also supplement some nutrients needed by the body. Therefore, whether asthma patients can eat watermelon mainly depends on the season they are in.