Burning of the skin should be prevented in indirect moxibustion. Although scarring moxibustion is performed by means of burning the skin so as to result in non-bacterial suppuration, this technique should only be used with the full knowledge and prior consent of the patient. It is a special therapeutic technique only performed at specific points.

Direct moxibustion should not be applied to points on the face, or at sites where tendons or large blood vessels are located. Moxibustion with non-bacterial suppuration near a joint is also inappropriate because the joint movement may make healing difficult. Special care should be taken in patients with reduced levels of consciousness, sensory disturbance, psychotic disorders, purulent dermatitis, or in areas of impaired circulation.