The best time of day for fumigation can be arranged according to individual needs and it is recommended to treat under the guidance of a medical professional. Fumigation is a branch of herbal external treatment. It is also known as herbal steaming therapy, herbal vapor bath therapy, medicine penetration therapy, and heat mist therapy. It can promote blood circulation, improve the body’s metabolism, and also promote the discharge of cold energy from the body. The time of fumigation can be arranged according to your convenience, and any time of the day can be used. Generally, it is recommended to fumigate one hour after meals, and each fumigation should last about 30-40 minutes, avoiding too long, and once a week is appropriate. In addition, fumigation should not be performed when you are overly tired or hungry, as this may cause dizziness. If dizziness occurs during fumigation, stop fumigation immediately and rest in bed, and the elderly and children should be accompanied by someone.