Clinically, there is no optimal treatment time for moxibustion in treating internal heat of yin deficiency, and it is not appropriate to apply moxibustion in treating patients with internal heat of yin deficiency. The main reason for this is that the deficiency of yin qi in the body leads to hyperactivity of yang qi or excessive yang qi damaging the yin qi, which leads to the occurrence of yin deficiency and internal heat. Moxibustion is a kind of warm treatment, such as Yin deficiency internal heat patients apply moxibustion treatment, will be more damage to the Yin Qi, aggravate the body of the evil of fire and heat, resulting in Yin deficiency internal heat patients symptoms worsened, and even cause constipation, dry mouth and tongue, bleeding and other serious discomfort symptoms. Yin deficiency and internal heat patients, in the clinical application of acupuncture, taking drugs and other methods of treatment. Yin deficiency and internal heat patients need to go to the regular medical institutions in the treatment, under the guidance of the doctor, do not identify and carry out moxibustion operation, so as not to delay the condition.