Suction method is to dilute Ogilvy by injecting physiological saline into the injection site again, and then insert the needle tube directly into the injection site to extract the substance. Although this method does not require surgery and does little harm to human body, many regular and qualified Olympic hospitals do not use this method and do not approve taking Ogilvy. The reason for this is the following：
1. Suction can only take out 50-60% of the substances in Ogilvy, and the residual Ogilvy is still very harmful to human body. The most intuitive thing is that Ogilvy's material can still be felt after surgery, and local pain still exists.
2. After Ogilvy injection enters the body, part of it will be fused with human tissues, and this part of the injection will not be extracted.
3. Improper extraction leads to the disorder of Ogilvy level, which may cause more difficult consequences and increase the difficulty of the second operation.
4. The extraction of Ogilvy may also cause infection, which may lead to other complications.
Experts pointed out that only a part of Ogilvy can be taken out by suction, while Ogilvy scattered in other parts, as well as the already formed coating and Ogilvy particles attached to the coating will not be taken out. For those patients with incorrect injection level and scattered acupoint injection, blind extraction is even more helpless. With the passage of time, the toxicity of the injected substance is continuously released, thus eroding its body, producing many unevenly distributed lumps and induration and inflammatory capsule connective tissue, which cannot be completely removed by aspiration.
In addition, Ogilvy hydrogel is a hydrophilic material, which will become larger and expand when it meets water. If liquid is injected into the injection site of the patient at this time, the injected substance layer will be more dispersed, which will cause wandering and displacement, which will bring greater harm to the patient, so authoritative experts disapprove of taking Ogilvy out by suction.