Diagnosis of complications after inguinal hernioplasty is of great importance in modern clinical practice. The main method of examination for this category of patients is ultrasound. Pain syndrome in the late stages after inguinal hernioplasty might be a consequence of various complications, which require differential diagnosis. One of the cases might be causalgia, in which the physical data are not always specific. Ultrasound examination of the abdominal wall was performed in 4 patients who underwent inguinal hernioplasty with complaints of pain in the area of surgical intervention. The performed examination revealed the signs of local edema and hypervascularization at the locations of metal staples fixing the mesh implant in the abdominal wall. Ultrasound examination of patients with causalgia allows to reveale the signs of local aseptic inflammation of tissues.