The inside of the 3d drawstring is very hard. What's going on here?

Surgical suture. The full name of 3d banding tightening is 3d biological banding tightening, which uses the puncture guide hook of independent technology to implant the biological banding into the vaginal side wall and back wall in a bi-directional and semi-circular way. It was hard inside after the operation, which was caused by the stitching of the mobile phone. The mechanical properties of the biological belt are used to control and lift ligaments and muscles to proper positions, and the regenerative function of the biological belt promotes the permanent reduction of loose tissues, thus realizing the non-invasive tightening of vaginal cavity and vaginal orifice.