A truss provides support for the herniated area, using a pad and belt arrangement to hold it in the correct position, just when it is put on before moving from bed.
Of historical interest, a variety of trusses are listed in the Snowden & Brother's catalog of the American Civil War era.
[1] Early versions of the hernia truss were daunting contraptions made from leather and steel with metal springs.
With light pressure the hernia is held securely day and night, and a radical cure is certain.
This book also describes dozens of hernia cases which appeared to be cured by this relatively primitive truss.