Is removing mesh aftet iguinal hernia repair is complicated?and what can be done to cure chronic pain after suegery?

No but : What the reason to remove , is complicated , like infection inside tissue planes, must speak to your surgeon , most common cause for chronic pain the nerve being pinched by scar tissue

Yes, removal of: Mesh is more complicated than placement of mesh, because it becomes adherent to all surrounding structures. Chronic neuralgia after inguinal hernia repair is a difficult problem, which requires expert care that might involve nerve release or even nerve transection. Consult with an experienced surgeon for definitive advice.