Generally speaking, after ozone ablation, you need to lie flat for at least 6-8 hours. The main purposes of continuous lying down at this time are as follows: 1. It is necessary to let the ozone injected into the inflamed tissues to produce sufficient effects to reduce inflammation and swelling. In addition, it takes time for the injected ozone to be fully absorbed. 2. to prevent irritation of the nerve roots concerned. After the ozone ablation, the nerve roots may be irritated during the ablation procedure, which may cause abnormal sensations. For example, some patients may feel a localized chill in the lower extremities or a sensation of small ants crawling around. These sensations can be gradually relieved only after the patient rests for a period of time. If the patient immediately gets up and moves or sits or stands, it may aggravate the irritation and make the above symptoms not easy to recover. 3. To prevent muscle spasm. In the process of doing ablation, due to the puncture or the drug itself, there may be some stimulation to the soft tissues of the lumbar region within a short period of time. So at this time the patient needs to lie flat for a period of time in order to reduce this irritation.