Fel sy’n wir am unrhyw fath o driniaeth, mae nifer fach o gleifion fodd bynnag yn dioddef cymhlethdodau gyda'r mewnblaniadau rhwyll torgest, ac mewn rhai o'r achosion hynny mae angen eu tynnu. Wrth edrych ar yr ystadegau sydd ar gael am y pum mlynedd ddiwethaf, prin yw'r achosion lle bu angen tynnu'r rhwyll. Er enghraifft, o’r 34,385 o gleifion a gafodd driniaeth atgyweirio torgest â deunyddiau prosthetig yng Nghymru, rhwyll yn bennaf, dim ond 238 oedd angen ei dynnu, sef 0.7 y cant, ffigur a fu’n gyson dros bum mlynedd.  Mae'n bwysig nodi efallai bod cleifion wedi dioddef poen ond heb geisio tynnu'r rhwyll, ac nad yw tynnu'r rhwyll o reidrwydd yn lleihau'r boen.
As with any procedure, a small number of patients however do experience complications with hernia mesh implants and in some of these cases removal is necessary. Available statistics reviewed from the past five years relating to mesh removal has shown that the cases where mesh removal is required are rare. For example, of the 34,385 patients who have undergone hernia repair with prosthetic materials in Wales, mostly mesh, only 238 had to have it removed, a rate of 0.7%, a figure consistent over 5 years. It is important to note that patients might have experienced pain but not sought mesh removal and that mesh removal once undertaken does not necessarily reduce pain.