The best time of day for moxibustion is related to the specific type of disease and cannot be generalized. If the patient has an acute condition, such as dysmenorrhea, moxibustion needs to be performed immediately. If the patient has a cold condition, moxibustion can warm up the yang energy and dispel the cold evil, consider having moxibustion treatment every morning, because the yang energy in nature is most vigorous in the morning, and the yang energy in the human body is also at its most vigorous time. Patients who suffer from insomnia can consider moxibustion treatment at dusk or before bedtime for better results. In addition, patients need to be careful not to eat too much or drink too much water before moxibustion, which may lead to increased blood flow in the stomach and intestines, and the accelerated blood circulation in the local acupuncture points after moxibustion may cause a reduction in blood supply to the brain.