The sign for "bandage" will vary depending on what is being bandaged.
If you are talking about applying a simple "Band-Aid" type bandage or asking someone if they have a "Band-Aid" then use this generic "bandage" sign.
The dominant "H-hand" is used to show a bandage on the back of the non-dominant hand.
BANDAGE: (as in a "Band-Aid" type)
If you are talking about bandaging someone's head or arm then you can use the dominant hand in a "B" handshape and make large wrapping motions around the body part that is being bandaged.
If you are taking about bandaging a leg or a foot, you can use the non-dominant arm or hand as a proxy to represent the leg or foot.
Notes: