Cutting plastic bags into underwear will have the following reactions: it will lead to long-term moisture of the skin, which is easy to induce pudendal infection, skin itching and other problems. Plastic underwear is not as comfortable as breathable materials such as cotton, and it may cause discomfort or even pain if worn for a long time. Finally, the quality of plastic underwear sold online cannot be guaranteed, and there will be problems such as hygiene and quality, which will pose potential risks to health. Plastics are macromolecules polymerized from monomers through addition polymerization or polycondensation reaction, with moderate deformation resistance, which is between fiber and rubber, and is composed of synthetic resins, fillers, plasticizers, stabilizers, lubricants, pigments and other additives.