If it is essential oil fumigation, please do not believe it. To tell the truth, this kind of health preservation method was originally very good, but the direct application of essential oil is not mature at present, and it is more used as the raw material of oral products. So you may feel some effects when you first use it, but it's just relaxing the meridians and activating the collaterals, and it's impossible to cure it. Take a look and you will know that these projects can only be seen in the most lax beauty salons in the country, and these products often do not have any relevant certificates. If there is, it is probably fake. Take the certificate to the industrial and commercial department to find out. In other words, these products have not been recognized by the state at all, and there is no approval for the production and sale of essential oils and fumigation products for health care. Therefore, your father had better do acupuncture, scraping and cupping on his waist. After all, these methods have been used by China people for thousands of years.