Menthol on the body is not clear, the use of the process need to pay attention to, menthol should be used under the guidance of a medical professional within the prescribed dosage, allergic to the drug patients with caution. Menthol is a Chinese herbal medicine made from the crystals extracted from the whole herb of Mentha piperita, family Labiatae, which is pungent in taste and cool in nature. The herb has the effect of clearing wind and heat, and is mainly used to treat wind-heat colds, headache, eye redness, sore throat, toothache and itchy skin, and the therapeutic effect varies from person to person. Currently there is no clear contraindication to the use of menthol, so the harm to the body is not clear. Menthol should be used under the guidance of a physician, not unauthorized use of medication.