Are incense and sandalwood harmful?

Shenxiang and sandalwood are both qi medicines, pungent, warm and dry, and when used incorrectly, they can easily deplete qi yin, resulting in dry mouth, thirst, irritability, shortness of breath and other symptoms.
Sinking incense is mildly warm in nature, pungent and bitter in flavor, and belongs to the spleen, stomach and kidney meridians. Its basic effects are to move qi to relieve pain (by regulating the body’s qi to relieve pain), to warm the stomach to stop vomiting, and to calm qi and asthma (by astringing the qi to relieve coughing and wheezing).
It can be used to treat chest and abdominal distension and pain due to cold condensation and stagnation of qi, stomach cold and vomiting, and kidney deficiency and wheezing. Adverse effects and contraindications of incense are not clear, and caution should be exercised for those with yin deficiency and fire or qi deficiency and subsidence.
Sandalwood is warm in nature, pungent in flavor, and belongs to the heart, spleen, stomach and lung meridians. Its basic effect is to move qi and regulate the middle, open the stomach and relieve pain. It can be used to treat chest paralysis (chest tightness and pain) caused by cold condensation and stagnation of qi, impassability of heart veins, chest tightness, qi stagnation and stomach cold, stabbing pain in the chest and stomach, abdominal distension and pain.
The adverse reactions and contraindications of Sandalwood are not known.
The drug must be used under medical supervision.